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Chemistry
Periodic Table
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1
The correct values of ionization enthalpies (in kJ mol⁻¹) of Si, P, Cl and S respectively are -
A
786, 1012, 999, 1256
B
1012, 786, 999, 1256
C
786, 1012, 1256, 999
D
786, 999, 1012, 1256
2
The correct order of decreasing first ionisation energy is -
A
Si > Al > Mg > Na
B
Si > Mg > Al > Na
C
Al > Si > Mg > Na
D
None of these
3
The electronic configuration of an element is 1s2 2s2 2p6 3s2 3p3 . What is the atomic number of the element, which is just below the above element in the periodic table?
A
33
B
34
C
36
D
49
4
The correct increasing order of metallic character for the given metals is:
A
Na < Mg < Be
B
Be < Mg < Na
C
Na < Be < Mg
D
Mg < Be < Na
5
Match List-I with List-II. List-I (A) Most electronegative element (B) The element having highest electron affinity (C) The element having lowest ionisation enthalpy (D) The element having highest ionisation enthalpy List-II (I) Chlorine (II) Cesium (III) Helium (IV) Fluorine Choose the correct answer from the options given below:
A
A-I, B-II, C-III, D-IV
B
A-IV, B-III, C-II, D-I
C
A-IV, B-I, C-II, D-III
D
A-II, B-III, C-IV, D-I
6
The pair of amphoteric hydroxides is -
A
Al(OH)₃, LiOH
B
Be(OH)₂, Mg(OH)₂
C
B(OH)₃, Be(OH)₂
D
Be(OH)₂, Zn(OH)₂
7
Which of the following is the correct increasing order of the ionisation enthalpies of the given second period elements?
A
B < Be < C
B
Be < B < C
C
B < C < Be
D
Be < C < B
8
The single bond covalent radius of P is 0.11 nm. The single bond covalent radius of Cl will be;
A
smaller than P
B
greater than P
C
same as P
D
twice of P
9
The correct order of stability of Al⁺, Al²⁺, Al³⁺ is-
A
Al³⁺ > Al²⁺ > Al⁺
B
Al²⁺ > Al³⁺ > Al⁺
C
Al²⁺ < Al⁺ > Al³⁺
D
Al³⁺ > Al⁺ > Al²⁺
10
The decreasing order of the second ionization energy of K, Ca and Ba is (At. Nos. K = 19, Ca = 20, Ba = 56)
A
K > Ca > Ba
B
Ca > Ba > K
C
Ba > K > Ca
D
K > Ba > Ca
11
Beryllium shows diagonal relationship with:
A
Magnesium
B
Silicon
C
Aluminium
D
Sodium
12
In which case the energy released is minimum -
A
Cl → Cl⁻
B
P → P⁻
C
N → N⁻
D
C → C⁻
13
For a given shell, the screening effect of d-electrons is;
A
Equal to the p-electrons
B
Much more than p-electrons
C
Same as f-electrons
D
Less than p-electrons
14
The first (IE₁) and second (IE₂) ionization energies (kJ/mol) of a few elements designated by Roman numerals are given below. Which of these would be an alkali metal ? IE₁ IE₂
A
I 2372 5251
B
II 520 7300
C
III 900 1760
D
IV 1680 3380
15
The species Cl- , K+ and Ca2+ contain the same number of electrons. In which order do their radii increase?
A
K+ < Cl- < Ca2+
B
Cl- < K+< Ca2+
C
Ca2+< K+ < Cl-
D
Ca2+ < Cl- < K+
16
The maximum tendency to form unipositive ion is for the element with the electronic configuration-
A
1s², 2s², 2p⁶, 3s²
B
1s², 2s², 2p⁶, 3s²3p¹
C
1s², 2s², 2p⁶, 3s²3p²
D
1s², 2s², 2p⁶, 3s²3p³
17
Which of the following is the most acidic in nature?
A
Cl2O7
B
Al2O3
C
Na2O
D
As2O3
18
Total number of elements present in 3rd and 4th period of the periodic table respectively are:
A
18 and 32
B
8 and 8
C
18 and 18
D
8 and 18
19
In the process Cl(g) + e⁻ → Cl⁻(g), ΔH is -
A
Positive
B
Negative
C
Zero
D
None
20
The correct order of first ionization enthalpy is:
A
Mg < Al < Na < Si
B
Mg < Na < Al < Si
C
Na < Mg < Al < Si
D
Na < Al < Mg < Si
21
For Rb(Z=37), points out the number of electrons present in L and N shells respectively -
A
8 and 18
B
18 and 8
C
8 and 8
D
2 and 8
22
First member of a group in s-block and groups 13-17 shows anomalous behaviour due to its. (A) Small size (B) Large (Charge/radius) ratio (C) High electronegativity Correct option is;
A
A and B only
B
B and C only
C
A and C only
D
A, B and C
23
Highest electron-affinity is associated with the configuration -
A
2s², 2p⁰
B
2s², 2p²
C
2s², 2p³
D
2s², 2p¹
24
Density of sodium and potassium follows the order -
A
K < Na
B
K > Na
C
Na ≈ K
D
None of these
25
The electron affinities of N, O, S and Cl are such that -
A
N < O < S < Cl
B
O < N < Cl < S
C
O ≈ Cl < N ≈ S
D
O < S < Cl < N
26
The first ionization potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be?
A
–2.25 eV
B
–5.1 eV
C
–10.2 eV
D
+5.1 eV
27
The correct order of atomic size of C, N, P, S follows the order -
A
N
B
N
C
C
D
C
28
The electronic configuration for manganese is;
A
1s2 2s2 2p6 3s2 3p5
B
[Ar]4s1
C
1s2 2s2 2p6 3s2 3p6 4s2 3d5
D
1s2 2s2 2p6
29
The correct set of decreasing order of electronegativity is -
A
Li, H, Na
B
Na, H, Li
C
H, Li, Na
D
Li, Na, H
30
Arrange the following in order of increasing atomic radii Na, Si, Al, Ar -
A
Na < Si < Al < Ar
B
Si < Al < Na < Ar
C
Ar < Al < Si < Na
D
Na < Al < Si < Ar
31
The element having the highest first ionization enthalpy is:
A
P
B
Al
C
N
D
C
32
Consider the following statements: I. The radius of an anion is larger than that of parent atom II. The I.E. increases from left to right in a period generally III. The electro-negativity of an element is the tendency of an isolated atom to attract an electron The correct statements are -
A
I alone
B
II alone
C
I and II
D
II and III
33
The element having the greatest difference between its first and second ionization energies is;
A
Ca
B
Sc
C
K
D
Ba
34
Which of the following electronic configuration of an atom has the lowest ionization enthalpy?
A
1s2 2s2 2p5
B
1s2 2s2 2p3
C
1s2 2s2 2p6 3s1
D
1s2 2s2 2p6
35
Lithium shows a diagonal relationship with;
A
Mg
B
Al
C
Na
D
Ga
36
Sodium forms Na⁺ ion but it does not form Na²⁺ because -
A
Very low value of IE₁ and IE₂
B
Very high value of IE₁ and IE₂
C
Low value of IE₁ and low value of IE₂
D
Low value of IE₁ and high value of IE₂
37
The element with maximum negative electron gain enthalpy is:
A
F
B
Br
C
I
D
Cl
38
Arrange F, C, O, N in the decreasing order of electronegativity -
A
O > F > N > C
B
F > N > C > O
C
C > F > N > O
D
F > O > N > C
39
Which of the following transitions involve maximum amount of energy?
A
M– (g) → M(g)
B
M(g) → M+ (g)
C
M+ (g) → M2+ (g)
D
M2+ (g) → M3+ (g)
40
Which of the following set of elements obeyes Newland’s octave rule -
A
Na, K, Rb
B
F, Cl, Br
C
Be, Mg, Ca
D
B, Al, Ga
41
Match List-I with List-I: List-I List-II (A) 1s2 2s2 2p6 3s2 3p6 4s1 (I) d-Block element (B) 1s2 2s2 2p6 3s2 3p6 (II) Halogen (C) 1s2 2s2 2p6 3s2 3p6 3d6 4s2 (III) Alkali metal (D) 1s2 2s2 2p5 (IV) Noble gas Choose the correct answer from the options given below:
A
A-I, B-II, C-III, D-IV
B
A-III,B-IV, C-I, D-II
C
A-I, B-III, C-II, D-IV
D
A-II, B-IV, C-III, D-I
42
Given below are two statements: Statement-I: He and Be have similar outer shell electronic configuration of ns2 type. Statement-II: Both He and Be are chemically inert. In the light of the above statements, choose the most appropriate answer from the options given below:
A
Statement I is correct but Statement II is incorrect.
B
Statement I is incorrect but Statement II is correct.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
43
Four elements P, Q, R and S have ground state electronic configuration as given. Which of the following option(s) represent(s) the correct order ?
A
Size of P < size of Q
B
Size of R < size of S
C
Size of P < size of R (appreciable difference)
D
All of these
44
Element with atomic number 10 belongs to;
A
2nd period
B
3nd period
C
4th period
D
5th period
45
The first ionization potentials of four consecutive elements present in the second period of periodic table are 8.3, 11.3, 14.5 and 13.6 eV respectively which one of the following is the first ionisation potential of nitrogen ?
A
13.6
B
14.5
C
11.3
D
8.3
46
In the modern long-form of the periodic table, total number of the horizontal rows and vertical columns are respectively;
A
18 and 6
B
7 and 18
C
18 and 7
D
6 and 18
47
Which of the following represents the correct increasing order of metallic character of the given elements?
A
Si < Be < Mg < K
B
Be < Si < Mg < K
C
K < Mg < Be < Si
D
Be < Si < K < Mg
48
Element P, Q, R and S belong to the same group. The oxide of P is acidic, oxide of Q and R are amphoteric while the oxide of S is basic. Which of the following element is the most electropositive ?
A
P
B
Q
C
R
D
S
49
Electron gain enthalpy is;
A
always positive.
B
may be negative or positive.
C
always negative.
D
always zero.
50
Which of the following is an amphoteric oxide?
A
MgO
B
Al₂O₃
C
SiO₂
D
P₂O₅
51
Consider the M(OH)₃ formed by all the group 13 elements. The correct sequence of acidic strength of hydroxides [M(OH)₃] is -
A
B(OH)₃ > Al(OH)₃ > Ga(OH)₃ > In(OH)₃ > Tl(OH)₃
B
B(OH)₃ > Tl(OH)₃ > Al(OH)₃ > In(OH)₃ > Ga(OH)₃
C
Al(OH)₃ > Ga(OH)₃ > B(OH)₃ > In(OH)₃ > Tl(OH)₃
D
B(OH)₃ > Al(OH)₃ > Ga(OH)₃ > In(OH)₃ > Tl(OH)₃
52
If an element X has the group number 16 and the period number 4. Then the atomic number of X is;
A
35
B
34
C
36
D
54
53
Modern periodic table is based on the atomic number of the elements. The experiment which proved the significance of atomic number was;
A
Muliken’s oil drop experiment.
B
Moseley’s work on X-Ray spectra.
C
Bragg’s work on X-Ray diffraction.
D
discovery of X-Ray by Roentgen.
54
What is the value of electron gain enthalpy of Na+ if IE1 of Na = 5.1 eV ?
A
+0.2 eV
B
–5.1 eV
C
–10.2 eV
D
+2.55 eV
55
Which of the following is not representative element?
A
Boron
B
Tantalum
C
Thallium
D
Sodium
56
Which of the following properties of group 16 elements show decreasing trend down the group? A. Atomic radius B. Ionisation enthalpy C. Electronegativity Choose the most appropriate answer from the options given below:
A
A and B
B
A and C
C
B and C
D
A, B and C
57
Electron addition would be easier in -
A
O
B
O⁺
C
O⁻
D
O²⁺
58
The atomic number of three elements A, B and C are a, a +1 and a + 2, C is an alkali metal in compound of A and C, the nature of bonding is;
A
co-ordinate
B
covalent
C
ionic
D
metallic
59
In the formation of a chloride ion, from an isolated gaseous chlorine atom, 3.8 eV energy is released, which would be equal to -
A
Electron affinity of Cl⁻
B
Ionisation potential of Cl
C
Electronegativity of Cl
D
Ionisation potential of Cl⁻
60
The ionic radii (in Å) of N3–, O2– and F– are respectively:
A
1.36, 1.40 and 1.71
B
1.36, 1.71 and 1.40
C
1.71, 1.40 and 1.36
D
1.71, 1.36 and 1.40
61
As per modern periodic law, the physical and chemical properties of elements are periodic functions of their:
A
Atomic number
B
Atomic size
C
Atomic volume
D
Atomic weight
62
Which of the following pair of elements belongs to the same period?
A
Mg and Sb
B
Ca and Zn
C
Na and Ca
D
Ca and Cl
63
Atomic number of Ag is 47. In the same group, the atomic numbers of elements placed above and below Ag in long form of periodic table will be;
A
29,65
B
39,79
C
29,79
D
39,65
64
In the general electronic configuration - (n – 2)f¹–¹⁴ (n – 1)d⁰–¹ ns², if value of n = 7 the configuration will be -
A
Lanthanides
B
Actinides
C
Transition elements
D
None
65
How many elements are there in 6th period of periodic table?
A
18
B
8
C
30
D
32
66
The ionisation energy of B and Al as compared to Be and Mg are -
A
Lower
B
Higher
C
Equal
D
None of these
67
I.P. of sodium is 5.14 eV, then I.P. of potassium will be -
A
Equal to sodium
B
5.68 eV
C
4.34 eV
D
10.28 eV
68
Which of the following process energy is liberated -
A
Cl → Cl⁺ + e
B
HCl → H⁺ + Cl⁻
C
Cl + e⁻ → Cl⁻
D
O⁻ + e⁻ → O²⁻
69
Atomic number of Ag is 47. In the same group the atomic number of elements placed above and below Ag will be -
A
37, 67
B
29, 79
C
39, 69
D
29, 65
70
Ionic radii are -
A
Inversely proportional to effective nuclear charge
B
Inversely proportional to square of effective nuclear charge
C
Directly proportional to effective nuclear charge
D
Directly proportional to square of effective nuclear charge
71
Which of the following configuration will have least electron affinity -
A
ns²np⁵
B
ns²np²
C
ns²np³
D
ns²np⁴
72
Which statement is correct ?
A
Sn⁴⁺ is more stable than Sn²⁺
B
Pb²⁺ is more stable than Pb⁴⁺
C
Both (A) and (B)
D
None of these
73
Which of the following is not a Dobereiner's Triad?
A
Li, Na, K
B
Cl, Br, I
C
F, Cl, Br
D
Ca, Sr, Ba
74
Neutral oxide among the following is/are;
A
CO
B
NO
C
N2O
D
All of these
75
Element X, Y and Z have atomic numbers 19, 37 and 55 respectively. Which of the following statements is true -
A
Their ionisation potential would increase with the increasing atomic number
B
'Y' would have an ionisation potential in between those of 'X' and 'Z'
C
'Z' would have the highest ionisation potential
D
'Y' would have the highest ionisation potential
76
Moving left to right in the periodic table atomic density -
A
First increases and then decreases
B
Remains the same
C
Can’t be said
D
Generally increases
77
Match List-I with List-II. List-I (Atomic number) (A) 101 (B) 87 (C) 105 (D) 116 List-II (block) (I) s-block (II) p-block (III) d-block (IV) f-block Choose the correct answer from the options given below:
A
A-I, B-IV, C-III, D-II
B
A-IV, B-I, C-III, D-II
C
A-II, B-III, C-I, D-IV
D
A-I, B-IV, C-II, D-III
78
Electronegativity of the following elements increases in the order -
A
O < N < S < P
B
P < S < N < O
C
P < N < S < O
D
S < P < N < O
79
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion (A): Na+ and Al3+ are isoelectronic but the magnitude of ionic radius of Al3+ is less than that of Na+. Reason (R): The magnitude of effective nuclear charge on the outer shell electrons in Al3+ is less than that in Na+. In the light of the above statements, choose the correct answer from the options given below:
A
A is true but R is false.
B
A is false but R is true.
C
Both A and R are true and R is the correct explanation of A.
D
Both A and R are true but R is NOT the correct explanation of A.
80
Second ionization potential of Li, Be and B is in the order;
A
Li > Be > B
B
Li > B > Be
C
Be > Li > B
D
B > Be > Li
81
From atomic no. 1 to atomic no. 110 how many of them contain e⁻ in f-subshell ?
A
28
B
57
C
58
D
53
82
In a group moving top to down the atomic density-
A
Decreases
B
Remains the same
C
Can’t be said
D
Generally increases
83
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion (A): Group I elements have maximum size in their respective horizontal periods in the periodic table (excluding noble gases). Reason (R): Group I elements are called alkaline earth metals. In the light of the above statements, choose the correct answer from the options given below:
A
A is false but R is true.
B
A is true but R is false.
C
Both A and R are true and R is the correct explanation of A.
D
Both A and R are true but R is NOT the correct explanation of A.
84
3d transition series starts from 'X' and ends with 'Y'. 'X' and 'Y' respectively are:
A
Zinc and Scandium
B
Scandium and Zinc
C
Vanadium and Nickel
D
Argon and Zinc
85
As applied to periodic table, which of the following sets include only magic numbers -
A
2, 8, 20, 28, 50, 82, 126
B
2, 8, 8, 18, 18, 32
C
2, 2, 8, 8, 18, 32
D
2, 8, 18, 18, 32, 32
86
Mendeleev’s periodic law states that the properties of elements are a periodic function of their;
A
atomic volume
B
atomic size.
C
atomic mass.
D
atomic number.
87
The correct order of electron affinity for the different families is -
A
Halogen > carbon > nitrogen > oxygen
B
Halogen > oxygen > nitrogen > carbon
C
Halogen > nitrogen > carbon > oxygen
D
Halogen > oxygen > carbon > nitrogen
88
Elements which occupied position in the lother meyer curve, on the peaks, were -
A
Alkali metals
B
Highly electro positive elements
C
Elements having large atomic volume
D
All
89
Which of the following is not isoelectronic series-
A
Cl⁻, P³⁻, Ar
B
N³⁻, Ne, Mg²⁺
C
B³⁺, He, Li⁺
D
N³⁻, S²⁻, Cl⁻
90
Which of the following element is expected to have highest negative electron gain enthalpy -
A
1s²,2s²2p⁶,3s²3p⁵
B
1s²,2s²2p³
C
1s²,2s²2p⁴
D
1s²,2s²2p⁵
91
Which of the following is not a Dobereiner’s Triad?
A
Li, Na, K
B
Cl, Br, I
C
F, Cl, Br
D
Ca, Sr, Ba
92
Consider the following changes - A → A⁺ + e⁻ : E₁ and A⁺ → A²⁺ + e⁻ : E₂ The energy required to pull out the two electrons are E₁ and E₂ respectively. The correct relationship between two energies would be -
A
E₁ < E₂
B
E₁ = E₂
C
E₁ > E₂
D
E₁ ≥ E₂
93
Which of the following represents the correct order of increasing electron gain enthalpy (with negative sign) for the elements O, S, F and Cl?
A
Cl < F < O < S
B
O < S < F < Cl
C
F < S < O < Cl
D
S < O < Cl < F
94
If an element X has the group number 16 and the period number 4. Then the atomic number of X is;
A
35
B
34
C
36
D
54
95
The IP₁, IP₂, IP₃, IP₄ and IP₅ of an element are 7.1, 14.3, 34.5, 46.8, 162.2 eV respectively. The element is likely to be -
A
Na
B
Si
C
F
D
Ca
96
Second electron affinity of an element is -
A
Always exothermic
B
Endothermic for few elements
C
Exothermic for few elements
D
Always endothermic
97
Given below are two statements: Statement I: When size of atom decreases, the force of attraction between the nucleus and valence electrons decreases. Statement II: On moving down the group, ionization enthalpy increases. In the light of the above statements, choose the most appropriate answer from the options given below:
A
Statement I is correct but Statement II is incorrect.
B
Statement I is incorrect but Statement II is correct.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
98
There are 10 neutrons in the nucleus of the element zM19. It belongs to -
A
f-block
B
s-block
C
d-block
D
None of these
99
3d transition series starts from ‘X’ and ends with ‘Y’. ‘X’ and ‘Y’ respectively are;
A
Zinc and Scandium
B
Scandium and Zinc
C
Vanadium and Nickel
D
Argon and Zinc
100
Atomic radius decreases in a period, but after halogens, the atomic radius suddenly increases. Thus, inert gases has almost highest radius in a period. The explanation for such an increase is-
A
Inert gases has most stable configuration
B
Inert gases do not take part in bonding
C
Vander Waal’s radius is reported in case of inert gases
D
None of these
101
Fluorine has low electron affinity than chlorine because of -
A
Smaller radius of fluorine, high density
B
Smaller radius of chlorine, high density
C
Bigger radius of fluorine, less density
D
Smaller radius of chlorine, less density
102
Consider the following statements: (A) Eka-aluminium is known as Gallium. (B) Law of Triads was given by Dobereiner. (C) Thorium is not an actinide metal. The incorrect statement(s) among the following is/are:
A
A and B
B
B only
C
A and C
D
C only
103
The correct decreasing order of atomic radii of group 13 elements is
A
Tl > In > Ga > Al
B
Tl > Ga > In > Al
C
Tl > Al > Ga > In
D
Tl > In > Al > Ga
104
HC≡C–CH=CH–CH₃. Which carbon atom will show minimum electronegativity -
A
Fifth
B
Third
C
First
D
Second
105
The element having highest ionization energy among the following is;
A
He
B
Ne
C
Ar
D
Kr
106
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): Size of I– ion is larger than I atom. Reason (R): Addition of electron in I atom results in increased repulsion among the electrons and decrease in effective nuclear charge. In the light of the above statements, choose the correct answer from the options given below:
A
A is true but R is false.
B
A is false but R is true.
C
Both A and R are true and R is the correct explanation of A.
D
Both A and R are true but R is NOT the correct explanation of A.
107
The electronic configuration of an element is 1s2, 2s22p6,3s23p4. The atomic number of the element present just below the above element in the periodic table -
A
36
B
34
C
33
D
32
108
The f-block elements belongs to which group of the periodic table?
A
II
B
III
C
IV
D
V
109
Which of the following elements is Eka-aluminium?
A
Ge
B
Ga
C
Si
D
B
110
The single bond covalent radius of P is 0.11 nm. The single bond covalent radius of Cl will be;
A
smaller than P
B
greater than P
C
same as P
D
twice of P
111
Which among the following oxides is neutral in nature?
A
Al₂O₃
B
Cl₂O₇
C
N₂O
D
Na₂O
112
Which of the following properties of group 16 elements show decreasing trend down the group? A. Atomic radius B. Ionisation enthalpy C. Electronegativity Choose the most appropriate answer from the options given below:
A
A and B only
B
A and C only
C
B and C only
D
A, B and C
113
Choose the incorrect match from the following.
A
Lanthanoids – Ce(Z = 58) to Lu(Z = 70).
B
s-block elements – reactive elements with low ionisation enthalpies.
C
Actinoids – Th(Z = 90) to Lr(Z = 103).
D
s and p block elements–Representative elements.
114
Match List-I with List-II. List-I (Oxides) A. K2O B. CO2 C. Al2O3 D. CO List-II (Nature of oxides) I. Amphoteric II. Basic III. Acidic IV. Neutral Choose the correct answer from the options given below:
A
A-II, B-III, C-I, D-IV
B
A-III, B-I, C-II, D-IV
C
A-I, B-II, C-IV, D-III
D
A-IV, B-II, C-III, D-I
115
Consider the following ionisation reactions A(g) → A⁺(g) + e⁻ A⁺(g) → A²⁺(g) + e⁻ A²⁺(g) → A³⁺(g) + e⁻ The correct order of ionisation energies will be;
A
A1 > A2 > A3
B
A1 = A2 = A3
C
A1 < A2 < A3
D
A3 = A2 < A1
116
Given below are two statements: Statement I: Helium and beryllium have similar outer electronic configuration of the type ns². Statement II: Both helium and beryllium are chemically inert. In the light of the above statements, choose the most appropriate answer from the options given below:
A
Statement I is correct but Statement II is incorrect.
B
Statement I is incorrect but Statement II is correct.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
117
The electronic configuration of an element is 1s²,2s²2p⁶,3s²3p⁴. The atomic number of element present just below the above element in periodic table is -
A
36
B
34
C
33
D
32
118
The process requiring the absorption of energy is -
A
F → F⁻
B
Cl → Cl⁻
C
O → O²⁻
D
H → H⁻
119
Highest ionisation potential in a period is shown by -
A
Alkali metals
B
Noble gases
C
Halogens
D
Representative elements
120
First, second and third IP values are 100eV, 150eV and 1500eV. Element can be -
A
Be
B
B
C
F
D
Na
121
For a given shell, the screening effect of d-electrons is:
A
equal to the p-electrons.
B
much more than p-electrons.
C
same as f-electrons.
D
less than p-electrons.
122
Which one of the following is the reason behind fluorine having lower electron affinity than chlorine?
A
Smaller radius of fluorine, high electron density.
B
Smaller radius of chlorine, high electron density.
C
Bigger radius of fluorine, less electron density.
D
Smaller radius of chlorine, less electron density.
123
The elements of groups, 1, 2, 13, 14, 15, 16 and 17 are collectively called -
A
Noble gases
B
Representative or normal elements
C
Transition elements
D
Inner transition elements
124
Which one of the following is the reason behind fluorine having lower electron affinity than chlorine?
A
Smaller radius of fluorine, high electron density.
B
Smaller radius of chlorine, high electron density.
C
Bigger radius of fluorine, less electron density.
D
Smaller radius of chlorine, less electron density.
125
Electron affinity is a -
A
Relative strength to attract the shared electron pair
B
Necessary energy required to remove the electron from the ultimate orbit
C
Energy released when an electron is added to the outermost shell
D
Energy released when an electron is added to the inner shell
126
Which among the following electronic configuration of an element has abnormally high difference between second and third ionization energy?
A
1s2 , 2s2 2p6 , 3s1
B
1s2 , 2s2 2p6 , 3s2 3p1
C
1s2 , 2s2 2p6 , 3s2 3p2
D
1s2 ,2s2 2p6 , 3s2
127
The order of first ionisation enthalpies of the elements Li, Be, B, Na is -
A
Li > Be > B > Na
B
Be > B > Li > Na
C
Na > Li > B > Be
D
Be > Li > B > Na
128
The second ionisation potentials in electron volts of oxygen and fluorine atoms are respectively given by -
A
35.1, 38.3
B
38.3, 38.3
C
38.3, 35.1
D
35.1, 35.1
129
The IUPAC name of the element having atomic number 141 is:
A
Unquadunium
B
Untetraunium
C
Unquadnilium
D
Untetranilium
130
The element with electronic configuration 1s2 2s2 2p6 3s2 3p6 3d8 4s2 belongs to:
A
s–block and group 2
B
d–block and group 8
C
s–block and group 10
D
d–block and group 10
131
The most electropositive element is;
A
Cs
B
Ga
C
Li
D
Pb
132
The electronic configuration of elements A, B and C are [He]2s1 , [Ne]3s1 and [Ar]4s1 respectively. Which one of the following is the correct decreasing order for IE1 (in kJ mol–1) of A, B and C?
A
A > B > C
B
C > B > A
C
B > C > A
D
C > A > B
133
The atomic masses of Li and K are 7 and 39, respectively. According to law of triads, the atomic mass of Na will be;
A
23
B
32
C
46
D
64
134
Consider the isoelectronic series : K⁺, S²⁻, Cl⁻ and Ca²⁺, the radii of the ions decrease as -
A
Ca²⁺ > K⁺ > Cl⁻ > S²⁻
B
Cl⁻ > S²⁻ > K⁺ > Ca²⁺
C
S²⁻ > Cl⁻ > K⁺ > Ca²⁺
D
K⁺ > Ca²⁺ > S²⁻ > Cl⁻
135
The decreasing order of the ionization potential of the following elements is -
A
Ne > Cl > P > S > Al > Mg
B
Ne > Cl > P > S > Mg > Al
C
Ne > Cl > S > P > Mg > Al
D
Ne > Cl > S > P > Al > Mg
136
Which of the following is not a Doebriner triad-
A
Li, Na, K
B
Mg, Ca, Sr
C
Cl, Br, I
D
S, Se, Te
137
The atom having the valence shell electronic configuration 4s² 4p² would be in -
A
Group II A and period 3
B
Group II B and period 4
C
Group IV A and period 4
D
Group IV A and period 3
138
Atomic radius of Noble gases is expressed as:
A
Metallic radius
B
Covalent radius
C
Van der Waals radius
D
Ionic radius
139
Which group of atoms have nearly same atomic radius -
A
Na, K, Rb, Cs
B
Li, Be, B, C
C
Fe, Co, Ni
D
F, Cl, Br, I
140
If the value of principle quantum number is same, then penetration power of orbitals increases in the order;
A
s < p < d < f
B
f < d < p < s
C
p < s < f < d
D
f < d < s < p
141
The compound of vanadium has magnetic moment 1.73 BM. The vanadium chloride has the formula -
A
VCl₂
B
VCl₃
C
VCl₄
D
VCl₅
142
Match list-I (atomic number of element) with list-II (position of elements in periodic table) and select the correct answer using the codes given below the lists : List-I (a) 19 (b) 22 (c) 32 (d) 64 List-II i. p-block ii. f-block iii. d-block iv. s-block Codes - (a) (b) (c) (d)
A
i ii iii iv
B
iv iii i ii
C
iv i iii ii
D
ii i iii iv
143
Choose the incorrect match from the following.
A
Lanthanoids- Ce(Z = 58) to Lu(Z = 70).
B
s-block elements – reactive elements with low ionization enthalpies.
C
Actinoids- Th(Z = 90) to Lr(Z = 103)
D
s and p block elements –Representative elements.
144
From the list given below, elements which belongs to the same group or sub-group are -
A
Atomic number = 12, 20, 4, 88
B
Atomic number = 8, 16, 34, 2
C
Atomic number = 11, 18, 27, 5
D
Atomic number = 24, 47, 42, 55
145
Which of the following sequences is correct for decreasing order of ionic radius -
A
Se²⁻ > I⁻ > Br⁻ > O²⁻ > F⁻
B
I⁻ > Se²⁻ > O²⁻ > Br⁻ > F⁻
C
Se²⁻ > I⁻ > Br⁻ > F⁻ > O²⁻
D
I⁻ > Se²⁻ > Br⁻ > O²⁻ > F⁻
146
M(g) → M⁺(g) + e⁻, ΔH = 100 eV M(g) → M²⁺(g) + 2e⁻, ΔH = 250 eV Which is incorrect statement ?
A
IE₁ of M(g) is 100 eV
B
IE₁ of M⁺(g) is 150 eV
C
IE₂ of M(g) is 250 eV
D
IE₂ of M(g) is 150 eV
147
The correct order of size would be -
A
Ni < Pd ≈ Pt
B
Pd < Pt < Ni
C
Pt > Ni > Pd
D
Pd > Pt > Ni
148
The electronic configuration for manganese is;
A
1s2 2s2 2p6 3s2 3p5
B
[Ar]4s1
C
1s2 2s2 2p6 3s2 3p6 4s2 3d5
D
1s2 2s2 2p6
149
Which of the following periods is the shortest one?
A
1
B
3
C
2
D
4
150
An element with atomic number 55 belongs to:
A
Group 18
B
Group 17
C
Group 1
D
Group 2
151
The correct order of second ionization potential of C, N, O and F is -
A
C > N > O > F
B
O > N > F > C
C
O > F > N > C
D
F > O > N > C
152
From the following pairs of ions which one is not an iso-electronic pair?
A
Na+ , Mg2+
B
Mn2+, Fe3+
C
Fe2+, Mn2+
D
O2– , F–
153
The correct decreasing order of second ionisation potential of carbon, nitrogen, oxygen and fluorine is;
A
O > F > N > C
B
F > O > N > C
C
C > N > O > F
D
O > N > F > C
154
Electronic configuration of M³⁺ is [Ar] 3d10 4s2 , it belongs to:
A
s-block
B
p-block
C
d-block
D
f-block
155
Which of the following properties is nearly same for two families - Family-1 Be, Mg, Ca, Sr........ Family-2 He, Ne, Ar, Kr........
A
EN
B
EA
C
IP
D
OS (oxidation state)
156
Ionisation energy increases in the order -
A
Be < B < C < N
B
B < Be < C < N
C
C < N < Be < B
D
N < C < Be < B
157
In which of the following options, the order of arrangement does not agree with the variation of property indicated against it?
(A) Mg²⁺ < Na⁺ < F⁻ < O²⁻ (ionic size)
(B) Li < Na < K < Rb (metallic radius)
(C) Si < C < N < O (electronegativity on Pauling scale)
(D) B < C < N < O (first ionisation enthalpy)
(E) I < Br < Cl < F (negative electron gain enthalpy)
Choose the correct option.
A
(A), (B) and (C) only
B
(D) and (E) only
C
(A), (B) and (D) only
D
(B), (C) and (E) only
158
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of given atomic species ?
A
F < Cl < O < S
B
S < O < Cl < F
C
O < S < F < Cl
D
Cl < F < S < O
159
Which of the following pair of elements belongs to the same period?
A
Mg and Sb
B
Ca and Zn
C
Na and Ca
D
Ca and Cl
160
Which of the following properties generally increase down the group?
A
Atomic radius
B
Ionization enthalpy
C
Electronegativity
D
Electron gain enthalpy
161
Adding electron a neutral gaseous atom usually leads to - (i) Liberation of energy (ii) Formation of anion (iii) Proton/electron ratio decrease (iv) Proton/electron ratio increase Code in -
A
(i), (iv)
B
(ii), (iii), (iv)
C
(i), (ii), (iv)
D
(i), (ii), (iii)
162
The electronic configuration of an element C is 1s², 2s², 2p⁶. The formula of substance containing only C will be -
A
C₈
B
C₄
C
C₂
D
C
163
First members of groups 13–17 shows anomalous behaviour due to their:
A
high electronegativity
B
small size
C
large charge/radius ratio
D
All of these
164
With reference to ionisation potential which one of the following sets is correct -
A
Li > K > B
B
B > Li > K
C
Cs > Li > K
D
Cs < Li < K
165
Which statement is correct -
A
The E.A. of carbon is greater than oxygen
B
The E.A. of sulphur is less than oxygen
C
The E.A. of iodine is greater than bromine
D
The E.A. of bromine is less than chlorine
166
Given below are two statements: Statement I: When size of atom decreases, the force of attraction between the nucleus and valence electrons decreases. Statement II: On moving down the group, ionization enthalpy increases. In the light of the above statements, choose the most appropriate answer from the options given below:
A
Statement I is correct but Statement II is incorrect.
B
Statement I is incorrect but Statement II is correct.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
167
The correct decreasing order of atomic size among the following species is : Ar, K+, Cl–, S2–, Ca2+
A
Ca2+ > K+ > Ar > Cl– > S2–
B
K+ > Ca2+ > Cl– > Ar > S2–
C
S2– > Cl – > Ar > K+ > Ca2+
D
S2– > Ar > Cl– > Ca2+ > K+
168
Z/e ratio for N³⁻, O²⁻ and F⁻ respectively will be -
A
0.7, 0.8 and 0.9
B
0.9, 0.8 and 0.7
C
7, 8 and 9
D
9, 8 and 7
169
Among the following elements (Whose electronic configuration is given below) the one having the highest ionisation energy is -
A
[Ne] 3s² 3p³
B
[Ne] 3s² 3p⁴
C
[Ne] 3s² 3p⁵
D
[Ne] 3s²
170
The most non-metallic element among the following is -
A
1s², 2s²2p⁴
B
1s², 2s²2p²
C
1s², 2s²2p³
D
1s², 2s²2p⁵
171
The correct order of electron affinity of B, C, N, O is -
A
O > C > N > B
B
B > N > C > O
C
O > C > B > N
D
O > B > C > N
172
Arrange in the increasing order of atomic radii of the following elements O, C, F, Cl, Br -
A
F < O < C < Cl < Br
B
F < C < O < Cl < Br
C
F < Cl < Br < O < C
D
C < O < F < Cl < Br
173
The correct order of ionic radii for the given ions is;
A
Ca2+ < K+ < Cl–
B
K+ < Ca2+ < Cl–
C
Cl– < Ca2+ < K+
D
Ca2+ < Cl– < K+
174
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Size of K+ is larger than that of K atom. Reason (R): K+ has less electrons than that of K atom, while nuclear charge is same in both. In the light of the above statements, choose the correct answer from the options given below.
A
A is true but R is false.
B
A is false but R is true.
C
Both A and R are true and R is the correct explanation of A.
D
Both A and R are true but R is NOT the correct explanation of A.
175
Newland’s law of octaves seemed to be true for elements up to:
A
Potassium
B
Magnesium
C
Calcium
D
Sulphur
176
From the following atomic numbers, the elements belonging to the same group is;
A
Z = 12, 38, 4, 88
B
Z = 9, 16, 3, 35
C
Z = 5, 11, 27, 19
D
Z = 24, 47, 42, 55
177
In which of the following arrangements the order is not according to the property indicated against it?
A
Li < Na < K < Rb (increasing metallic radius)
B
I < Br < F < Cl (increasing electron gain enthalpy (with negative sign))
C
B < C < N < O (increasing first ionisation enthalpy)
D
Al3+ < Mg2+ < Na+ < F– (increasing ionic size)
178
Which of the following order of atomic/ionic radius is incorrect?
A
I –> I > I+
B
Mg+2> Na+> F–
C
P +5< P+3
D
Li > Be > B
179
Match List–I with List–II. List–I (Element) (A) Ca (Z = 20) (B) Ga (Z = 31) (C) Sc (Z = 21) (D) Ce (Z = 58) List–II (Block) (I) d-block (II) s-block (III) f-block (IV) p-block Choose the correct answer from the options given below.
A
A–II, B–IV, C–I, D–III
B
A–IV, B–II, C–III, D–I
C
A–IV, B–III, C–II, D–I
D
A–II, B–IV, C–III, D–I
180
Atomic radii of Fluorine and Neon in Angstrom units are given by -
A
0.72, 1.60
B
1.60, 1.60
C
0.72, 0.72
D
None of these
181
The number of elements in 5th and 6th period of periodic table are respectively -
A
8, 18
B
18, 18
C
18, 32
D
18, 28
182
Arrange the elements S, P, As in order of increasing ionization enthalpy -
A
S < P < As
B
P < S < As
C
As < S < P
D
As < P < S
183
The f-block elements belongs to which group of the periodic table?
A
II
B
III
C
IV
D
V
184
238/92 U (IIIB) changes to 234/90 Th by emission of α-particle. Daughter element will be in -
A
IIIB
B
IB
C
VB
D
IIA
185
The correct order of electron gain enthalpy in group 16 elements is;
A
O > S > Se
B
S > O > Se
C
S > Se > O
D
Se > S > O
186
Which among the following statements are correct? A. s–block, p–block and d–block elements are together known as Representative elements. B. The elements after uranium are called Transuranium elements. C. f–block elements are known as Inner–transition elements. Choose the most appropriate answer from the options given below.
A
Only A and B
B
Only A and C
C
Only B and C
D
A, B and C
187
In which of the following compounds manganese show maximum radius -
A
MnO₂
B
KMnO₄
C
MnO
D
K₃[Mn(CN)₆]
188
Atomic number of element Ununnilium is;
A
101
B
110
C
111
D
100
189
The correct sequence given below containing neutral, acidic, basic and amphoteric oxide each, respectively, is;
A
NO, Al2O3, CO2, CaO
B
Al2O3, NO, CaO, CO2
C
NO, CO2, Al2O3, CaO
D
NO, CO2, CaO, Al2O3
190
Which of the following is the correct order of second ionisation potential?
A
Be < Li < B < C
B
Mg < Al < Si < Na
C
C < N < F < O
D
P < S < Cl < Si
191
Pauling’s electronegativity values for element are useful in predicting;
A
polarity of the molecules.
B
nature of oxide.
C
metallic character.
D
All of these
192
The general outer electronic configuration of d-block elements can be represented as:
A
(n–2)d1–10ns2
B
(n–2)d0–10ns1
C
(n–1)d0–10ns2 np1–6
D
(n–1)d1–10ns0–2
193
The correct order regarding the electro-negativity of hybrid orbitals of carbon is ?
A
sp < sp² < sp³
B
sp > sp² < sp³
C
sp > sp² > sp³
D
sp < sp² > sp³
194
Which of the following species of Mn has lowest electronegativity?
A
Mn(II)
B
Mn(IV)
C
Mn(VI)
D
Mn(VII)
195
Which of the following sets of elements belong to the same period?
A
Li, Na and K
B
Li, Mg and Ca
C
Ni, Cu and Zn
D
F, Cl and Br
196
The atom having the valence shell electronic configuration 4s² 4p² would be in-
A
Group II A and period 3
B
Group II B and period 4
C
Group IV A and period 4
D
Group IV A and period 3
197
The incorrect statement among the following is-
A
The properties of elements are periodic function of their atomic numbers
B
Among the isoelectric species, Na⁺, Mg²⁺ and Al³⁺ ion having smalles radius is Al³⁺ ion
C
The outer most electronic configuration of group 15 elements is ns²np⁵
D
Electronegativity of an element depend upon its atomic size
198
The IUPAC name of an element with atomic number 119 is;
A
Ununoctium
B
Ununennium
C
Unnilennium
D
Unununnium
199
The correct statement about ionisation energies of Cu and Zn is;
A
IE1 of Cu is less than that of Zn.
B
IE2 of Cu is more than that of Zn.
C
IE2 of Zn is more than that of Cu.
D
Both (1) and (2)
200
Which of the following in increasing order of paramagnetism ?
A
Al < Mg < O < N
B
Mg < Al < N < O
C
Mg < Al < O < N
D
N < O < Al < Mg
201
Given below are two statements: Statement I: 5th period of the periodic table contains 32 elements. Statement II: Metals are good conductors of heat and electricity. In the light of the above statements, choose the most appropriate answer from the options given below:
A
Both Statement I and Statement II are correct.
B
Statement I is correct but Statement II is incorrect.
C
Statement I is incorrect but Statement II is correct.
D
Both Statement I and Statement II are incorrect.
202
The general outer electronic configuration of the f-block elements is:
A
(n–2)f1–14(n–1)d0–1ns2
B
(n–1)f1–14nd0–1ns2
C
(n–2)f1–14(n–1)d1ns2
D
(n–1)f1–14nd0–10ns2
203
Which one of the following is incorrect ?
A
An element which has high electronegativity always has high electron gain enthalpy
B
Electron gain enthalpy is the property of an isolated atom
C
Electronegativity is the property of a bonded atom
D
Both electronegativity and electron gain enthalpy are usually directly related to nuclear charge and inversely related to atomic size
204
In the modern long-form of the periodic table, total number of the horizontal rows and vertical columns are respectively;
A
18 and 6
B
7 and 18
C
18 and 7
D
6 and 18
205
IP₁ and IP₂ of Mg are 178 and 348 K.cal mol⁻¹. The enthalpy required for the reqction Mg → Mg²⁺ + 2e⁻ is -
A
+170 K.cal
B
+526 K.cal
C
−170 K.cal
D
−526 K.cal
206
Arrange N, O and S in order of decreasing electron affinity -
A
S > O > N
B
O > S > N
C
N > O > S
D
S > N > O
207
Which of the following statements are correct?
A
Tl³⁺ salts are oxidising agents
B
Ga⁺ salts are reducing agents
C
Pb⁴⁺ salts are better oxidising agents
D
All of these
208
An element having the electronic configuration: 1s2 2s2 2p6 3s2 3p1 is:
A
an inert gas
B
a transition element
C
an inner transition element
D
a representative element
209
An element belongs to 3rd period and group -13 of the periodic table. Which of the following properties will be shown by the element?
A
Good conductor of electricity and metallic.
B
Liquid and non-metallic.
C
Solid and non-metallic
D
Insulator and non-metallic.
210
3 students Ram, Shyam and Raj measured the radius of an element A. The values of their practical were not same (Ram = 110 nm, Shyam = 190 nm and Raj = 108 nm). Their teacher explained that their measurement were correct by saying that the recorded values are -
A
Metallic, vanderwaal and covalent radii respectively
B
Covalent, Metallic and Vander wall radii respectively
C
Vander wall, Metallic and covalent radii respectively
D
None of the above
211
The elements with atomic numbers 90 to 103 are known as -
A
d-block elements
B
lanthanides
C
actinides
D
transition elements
212
The correct decreasing order of metallic character is;
A
Be > Ca > K
B
Ca > K > Be
C
K > Ca > Be
D
K > Be > Ca
213
Given below are two statements: Statement I: Li is diagonally related to Na. Statement II: 16th group elements are also known as halogens. In the light of the above statements, choose the most appropriate answer from the options given below:
A
Both Statement I and Statement II are correct.
B
Statement I is correct but Statement II is incorrect.
C
Statement I is incorrect but Statement II is correct.
D
Both Statement I and Statement II are incorrect.
214
Among the following which one has highest ionisation energy?
A
N
B
O
C
F
D
He
215
Lanthanoids are -
A
14 elements in the seventh period (Atomic no. = 58 to 71) that are filling 4f subshell
B
14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4f subshell
C
14 elements in the seventh period (atomic no. = 90 to 103) that are filling 5f subshell
D
14 elements in the sixth period (atomic no. = 58 to 71) that are filling 4f subshell
216
For the processes K⁺(g) ─I→ K(g) ─II→ K(s)-
A
Energy is released in (I) and absorbed in (II)
B
Energy is absorbed in (I) and released in (II)
C
Energy is absorbed in both the processes
D
Energy is released in both the processes
217
The correct order of increasing size is -
A
Mg²⁺ < Na⁺ < F⁻ < Al
B
F⁻ < Al < Na⁺ < Mg²⁺
C
Al < Mg²⁺ < F⁻ < Na⁺
D
Na⁺ < Al < F⁻ < Mg²⁺
218
Which of the following has largest radius -
A
1s², 2s², 2p⁶, 3s²
B
1s², 2s², 2p⁶, 3s², 3p¹
C
1s², 2s², 2p⁶, 3s², 3p³
D
1s², 2s², 2p⁶, 3s², 3p⁵
219
In the periodic table, the basic character of oxides;
A
increases from left to right and decreases from top to bottom.
B
decreases from right to left and increases from top to bottom.
C
decreases from left to right and increases from top to bottom.
D
decreases from left to right and increases from bottom to top.
220
The first ionisation energy of Mg, Al, P and S follows the order -
A
Mg < Al < P < S
B
Al < Mg < P < S
C
Al < Mg < S < P
D
Mg < Al < S < P
221
Which of the following transitions involves maximum amount of energy -
A
M(g) → M(g)
B
M(g) → M⁺(g)
C
M⁺(g) → M²⁺(g)
D
M²⁺(g) → M³⁺(g)
222
The element ununoctium belongs to the;
A
f-block
B
Noble gases
C
d-block
D
s-block
223
Which of the following is correct order of increasing bond strength -
A
HF < HCl < HBr < HI
B
HI < HBr < HF < HCl
C
HI < HBr < HCl < HF
D
HCl < HBr < HF < HI
224
The atomic masses of Li and K are 7 and 39, respectively. According to law of triads, the atomic mass of Na will be;
A
23
B
32
C
46
D
64
225
Element with atomic number 10 belongs to;
A
2nd period
B
3rd period
C
4th period
D
5th period
226
In the periodic table, the basic character of oxides;
A
increases from left to right and decreases from top to bottom.
B
decreases from right to left and increases from top to bottom.
C
decreases from left to right and increases from top to bottom.
D
decreases from left to right and increases from bottom to top.
227
(A), (B) and (C) are elements in the second short period. Oxide of (A) is ionic, that of (B) is amphoteric and of (C) large a molecule. (A), (B) and (C) have atomic number in the order -
A
(A) < (B) < (C)
B
(C) < (B) < (A)
C
(A) < (C) < (B)
D
(B) < (A) < (C)
228
Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Atomic radius of gallium is higher than that of aluminium. Reason R: The presence of additional 10 d-electrons offer poor screening effect for the outer electrons from increased nuclear charge in gallium. In the light of the above statements, choose the correct answer from the options given below:
A
A is true but R is false.
B
A is false but R is true
C
Both A and R are true and R is the correct explanation of A.
D
Both A and R are true but R is NOT the correct explanation of A.
229
Diagonal relationship is shown by;
A
C and S
B
Mg and Sc
C
Li and Mg
D
O and C
230
Which of the following has the largest radius?
A
Cs+
B
Mg2+
C
Na+
D
Li+
231
From the following atomic numbers, the elements belonging to the same group is;
A
Z = 12, 38, 4, 88
B
Z = 9, 16, 3, 35
C
Z = 5, 11, 27, 19
D
Z = 24, 47, 42, 55
232
The electronegativity value of oxygen on the basis of Pauling scale is:
A
3.5
B
3.0
C
4.0
D
2.5
233
The atomic number of the element having highest electron affinity in the periodic table is;
A
8
B
17
C
9
D
16
234
Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: In each period, second ionization energy of alkali metal is highest. Reason R: Second electron is removed in alkali metals from noble gas configuration which is most stable. In the light of the above statements, choose the correct answer from the options given below:
A
A is true but R is false.
B
A is false but R is true
C
Both A and R are true and R is the correct explanation of A.
D
Both A and R are true but R is NOT the correct explanation of A.
235
The correct order of ionic radii among the following species is;
A
Ca2+ > Cl– > S2– > P3–
B
S2– > P3– > Cl– > Ca2+
C
Ca2+ < S2– < Cl– < P3–
D
Ca2+ < Cl– < S2– < P3–
236
Which is most acidic oxide ?
A
Cl₂O
B
ClO₂
C
Cl₂O₆
D
Cl₂O₇
237
The electron affinity values for the halogens shown the following trend -
A
F < Cl > Br > I
B
F < Cl < Br < I
C
F > Cl > Br > I
D
F < Cl > Br < I
238
Strongest reducing agent among the following is -
A
F⁻
B
Cl⁻
C
Br⁻
D
I⁻
239
Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R: Assertion (A): 18th group elements are also known as inert gases. Reason (R): Group III elements are called alkaline earth metals. In the light of the above statements, choose the correct answer from the options given below:
A
A is true but R is false.
B
A is false but R is true.
C
Both A and R are true and R is the correct explanation of A.
D
Both A and R are true but R is NOT the correct explanation of A.
240
The discovery of which of the following group of elements gave a death blow to the Newlands Law -
A
Inert gases
B
Alkali metals
C
Transuranic element
D
Halogens
241
The basic character of MgO, SrO, K₂O and NiO increases in the order -
A
K₂O < SrO < MgO < NiO
B
NiO < MgO < SrO < K₂O
C
MgO < NiO < SrO < K₂O
D
K₂O < MgO < NiO < SrO
242
The correct increasing order of ionic radii is:
A
P3– < S2– < Cl–
B
Cl– < S2– < P3–
C
P3– < Cl– < S2–
D
Cl– < P3– < S2–
243
Which of the following d-block metal does not show most of the properties of transition elements?
A
Fe
B
Cr
C
Hg
D
Cu
244
Values of first four ionization potential of an elements are 68, 370, 400, 485. It belongs to
A
1s2, 2s1
B
1s2, 2s2, 2p1
C
1s2, 2s2, 2p6, 3s1
D
(1) and (3) both
245
Consider the following changes, A → A⁺ + e⁻ (E1) A⁺ → A²⁺ + e⁻ (E2) The energy required to pull out the two electrons are E1 and E2 respectively. The correct relationship between two energies would be:
A
E1 < E2
B
E1 = E2
C
E1 > E2
D
E1 ≥ E2
246
Ce (Atomic no. = 58) is a member of;
A
s-block
B
p-block
C
d-block
D
f-block
247
The elements of group 17 are called;
A
noble gases.
B
halogens.
C
chalcogens.
D
alkali metals.
248
The correct order of electron affinity is -
A
Be < B < C < N
B
Be < N < B < C
C
N < Be < C < B
D
N < C < B < Be
249
Successive ionisation energies of an element X are given below (in Kcal) IP1 = 165, IP2 = 195, IP3 = 556, IP4 = 595 Electronic configuration of the element X is:
A
1s2 2s2 2p6 3s2 3p1
B
1s2 2s1
C
1s2 2s2 2p2
D
1s2 2s2 2p6 3s1
250
Given below are two statements: Statement I: Fluorine is more electronegative than oxygen. Statement II: Lanthanoids and actinoids both belong to same group. In the light of the above statements, choose the most appropriate answer from the options given below.
A
Both Statement I and Statement II are correct.
B
Statement I is correct but Statement II is incorrect.
C
Statement I is incorrect but Statement II is correct.
D
Both Statement I and Statement II are incorrect.
251
Which of the following is affected by stable configuration of an atom : (i) Electronegativity (ii) Ionisation potential (iii) Electron affinity Correct answer is -
A
Only electronegativity
B
Only ionisation potential
C
Electron affinity and ionisation potential
D
All of the above
252
The screening effect of d-electrons is -
A
Equal to the p-electrons
B
Much more than p-electrons
C
Same as f-electrons
D
Less than p-electrons
253
Given below are two statements : Statement I: An element in the extreme left of the periodic table forms acidic oxides. Statement II: Acid is formed during the reaction between water and oxide of a reactive element present in the extreme right of the periodic table. In the light of the above statements, choose the most appropriate answer from the options given below:
A
Statement I is correct but Statement II is incorrect.
B
Statement I is incorrect but Statement II is correct.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
254
Arrange into the order of increasing basicity (NO₂, K₂O, ZnO) -
A
NO₂ < ZnO < K₂O
B
K₂O < ZnO < NO₂
C
NO₂ < K₂O < ZnO
D
K₂O < NO₂ < ZnO
255
According to Henry Moseley, what does Z represent in the graph?
A
Atomic mass
B
Atomic number
C
Mass number
D
Number of neutrons
256
Successive ionisation energies of an element ‘X’ are given below (in k.cal) : IP₁ = 165 IP₂ = 195 IP₃ = 556 IP₄ = 595 Electronic configuration of the element 'X' is -
A
1s², 2s² 2p⁶, 3s² 3p²
B
1s², 2s¹
C
1s², 2s² 2p²
D
1s², 2s² 2p⁶, 3s²
257
A sudden large jump between the values of 2nd and 3rd IP of an element would be associated with the electronic configuration-
A
1s², 2s² 2p⁶, 3s¹
B
1s², 2s² 2p⁶, 3s² 3p⁵
C
1s², 2s² 2p⁶, 3s² 3p²
D
1s², 2s² 2p⁶ 3s²
258
Atomic number 15, 33, 51 represents the following family -
A
Carbon family
B
Nitrogen family
C
Oxygen family
D
None
259
Correct orders of 1st I.P. are - (i) Li < B < Be < C (ii) O < N < F (iii) Be < N < Ne
A
(i), (ii)
B
(ii), (iii)
C
(i), (iii)
D
(i), (ii), (iii)
260
Match List-I with List-II. List-I (A) 1s2 , 2s2 2p5 (B) 1s2 , 2s2 2p6 , 3s2 3p6 (C) 1s2 , 2s1 (D) 1s2 , 2s2 2p6 , 3s2 3p6 3d6 , 4s2 List-II (I) Noble gas (II) Halogen (III) Transition element (IV) Alkali metal Choose the correct answer from the options given below:
A
A-I, B-II, C-IV, D-III
B
A-II, B-I, C-IV, D-III
C
A-II, B-I, C-III, D-IV
D
A-I, B-II, C-III, D-IV
261
Least basic oxide is -
A
Fe₂O₃
B
FeO
C
BaO
D
Na₂O
262
Increasing order of electronegativity is -
A
Bi < P < S < Cl
B
P < Bi < S < Cl
C
S < Bi < P < Cl
D
Cl < S < Bi < P
263
Which of the following elements has the highest value of electronegativity?
A
H
B
Cl
C
Li
D
P
264
Which of the following set of species are isoelectronic species?
A
N3– , K+ , Cl–
B
Li+ , Be2+ , H+
C
Na+ , Al3+ , Mg2+
D
O2– , F– , K+
265
The order of size is -
A
S²⁻ > Cl⁻ > O²⁻ > F⁻
B
Cl⁻ > S²⁻ > O²⁻ > F⁻
C
S²⁻ > O²⁻ > Cl⁻ > F⁻
D
S²⁻ > O²⁻ > F⁻ > Cl⁻
266
The ionic radii of N³⁻, O²⁻ and F⁻ are respectively given by -
A
1.36, 1.40, 1.71
B
1.36, 1.71, 1.40
C
1.71, 1.40, 1.36
D
1.71, 1.36, 1.40
267
Outermost electronic configuration of the most electronegative element is -
A
ns²np³
B
ns²np⁶
C
ns²
D
ns²np⁵
268
Which of the following is correct statement ?
A
SO₂ is anhydride of sulphuric acid
B
NO₂ is anhydride of nitric acid
C
Cl₂O₇ is anhydride of perchloric acid
D
N₂O is anhydride of nitrous acid
269
Which of the following has 2nd IP < 1st IP -
A
Mg
B
Ne
C
C
D
None
270
Gd(Atomic number = 64) is a member of:
A
s-block
B
p-block
C
d-block
D
f-block
271
Modern periodic table is based on atomic no. experiments which proved importance of at no. was -
A
Braggs work on X-ray diffraction
B
Moseleys work on X-ray spectrum
C
Mulliken’s oil drop experiment
D
Lother meyer curve plotted between at vol. & at. wt.
272
Arrange the following hydrides in their increasing acid strength [CH₄, H₂S, PH₃ and SiH₄] -
A
H₂S < PH₃ < SiH₄ < CH₄
B
CH₄ < SiH₄ < PH₃ < H₂S
C
SiH₄ < CH₄ < PH₃ < H₂S
D
CH₄ < H₂S < PH₃ < SiH₄
273
Arrange the following elements in decreasing order of their electron affinity
A
S > Se > O
B
Se > S > O
C
O > Se > S
D
Se > O > S
274
Arrange the elements in increasing order of atomic radius Na, Rb, K, Mg -
A
Na < K < Mg < Rb
B
K < Na < Mg < Rb
C
Mg < Na < K < Rb
D
Rb < K < Mg < Na
275
Which of the following element is a metalloid?
A
Cl
B
Br
C
Si
D
Na
276
Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Na+ and Al3+ are isoelectronic but the magnitude of ionic radius of Al3+ is less than that of Na+. Reason R: The magnitude of effective nuclear charge on the outer shell electrons in Al3+ is less than that in Na+. In the light of the above statements, choose the correct answer from the options given below:
A
A is true but R is false.
B
A is false but R is true.
C
Both A and R are true and R is the correct explanation of A.
D
Both A and R are true but R is NOT the correct explanation of A.
277
The name ‘Rare earths’ is used for -
A
Lanthanides only
B
Actinides only
C
Both lanthanides and actinides
D
Alakaline earth metals
278
Pd has exceptional electronic configuration of 4d10 5s0 . It belong to;
A
4th period, group 11
B
5th period, group 10
C
6th period, group 9
D
3rd period, group 16
279
Which of the following is wrong -
A
NH₃ < PH₃ < AsH₃ ⇒ Acidic character
B
Li < Be < B < C ⇒ IE₁
C
Al₂O₃ < MgO < Na₂O < K₂O ⇒ Basic character
D
Li⁺ < Na⁺ < K⁺ < Cs⁺ ⇒ Ionic radius
280
Match list-I with list-II and select the correct answer using the codes given below - List-I (I) Li⁺ (II) Na⁺ (III) Br⁻ (IV) I⁻ List-II Radius (in pm) (a) 216 (b) 195 (c) 60 (d) 95 Codes : I II III IV
A
a b d c
B
b c a d
C
c d b a
D
d c b a
281
The size of the species, Pb, Pb²⁺, Pb⁴⁺ decreases as -
A
Pb⁴⁺ > Pb²⁺ > Pb
B
Pb > Pb²⁺ > Pb⁴⁺
C
Pb > Pb⁴⁺ > Pb²⁺
D
Pb⁴⁺ > Pb > Pb²⁺
282
The element having very high ionization enthalpy but zero electron gain enthalpy is-
A
H
B
F
C
He
D
Be
283
The chloride of an element ‘L’ gives neutral solution in water. The element ‘L’ belongs to group -
A
13th (III A)
B
15th (VA)
C
1 (IA)
D
16th (VIA)
284
In which of the following pairs, the ionisation energy of the first species is less than that of the second?
A
N, P
B
Be2+, Be
C
N, N–
D
S, P
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