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Chemistry

GOC

64 questions · Click an option and press Check Answer to reveal the result

1
Which of the following carbocation is least stable?
A
(1)
B
(2)
C
(3)
D
(4)
2
Which is incorrect stability order?
A
(1)
B
(2)
C
(3)
D
(4)
3
Given below are two statements: Statement I: Metamerism arises due to different alkyl chains on either side of the functional group in the molecule. Statement II: Methoxypropane and ethoxyethane show metamerism. In the light of the above statements, choose the correct answer from the options given below:
A
Statement I is incorrect, but Statement II is correct.
B
Statement I is correct, but Statement II is incorrect.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
4
Given below are two statements: Statement I: The given two compounds are structural isomers. Statement II: The compounds given above both have 4 carbon atoms and 8 hydrogen atoms. In the light of the above statements, choose the correct answer from the options given below:
A
Statement I is incorrect, but Statement II is correct.
B
Statement I is correct, but Statement II is incorrect.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
5
Which of the following compound can not show geometrical isomerism?
A
B
C
D
6
The IUPAC name of the given compound is;
A
1,1-Dimethylbutane-1,3-diol
B
4-Methylpentane-2,4-diol
C
2-Methylpentane-2,4-diol
D
1,3,3-Trimethylpropane-1,3-diol
7
A
B
C
D
8
A
B
C
D
9
A
6
B
5
C
8
D
7
10
Which of the following compound is/are chiral ?
A
B
C
D
11
The most stable carbocation among the following is;
A
(1)
B
(2)
C
(3)
D
(4)
12
Sodium carbonate extract is prepared by
A
Fusing soda and mixture and then extracting with water
B
Dissolving NaHCO3 and mixture in dil HCl
C
Boiling Na2CO3 and mixture, in dil. HCl
D
Boiling Na2CO3 and mixture, in distilled water
13
Hex-2-ene and 2-methylpent-2-ene exhibit;
A
chain isomerism
B
position isomerism
C
functional isomerism
D
optical isomerism
14
A
B
C
D
15
How many π electrons in conjugation are there in the following species?
A
2
B
4
C
6
D
8
16
Which of the following alkenes is the most stable?
A
(1)
B
(2)
C
(3)
D
CH2=CH2
17
The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is;
A
–COOH > –SO3H > –CONH2 > –CHO
B
–SO3H > –COOH, –CONH2 > –CHO
C
–CHO > –COOH > –SO3H > –CONH2
D
–CONH2 > –CHO > –SO3H > –COOH
18
A
(i) > (ii) > (iii)
B
(ii) > (iii) > (i)
C
(iii) > (i) > (ii)
D
(iii) > (ii) > (i)
19
A
B
C
D
20
Which of the following compounds is isomeric with 2,2,4,4-tetramethylhexane?
A
hexane
B
4-isopropylheptane
C
pentane
D
heptane
21
The pair of structures represents;
A
Chain isomer
B
Position isomers
C
Conformers
D
Functional isomers
22
Given below are two statements: Statement I: Benzene is aromatic in nature. Statement II: Pyridine is aromatic in nature. In the light of the above statements, choose the correct answer from the options given below:
A
Statement I is incorrect, but Statement II is correct.
B
Statement I is correct, but Statement II is incorrect.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
23
Which of the following molecules is chiral?
A
(1)
B
(2)
C
(3)
D
(4)
24
A
3-ethanoyl oxycyclopent-4-ene carboxylic acid
B
2-ethanoyl oxycyclopent-2-ene carboxylic acid
C
4-ethanoyl oxycyclopent-3-ene carboxylic acid
D
4-ethanoyl oxycyclopent-2-ene carboxylic acid
25
In which of the following compounds carbon–oxygen bond length is minimum?
A
CH3–OH
B
C6H5–CH2–OH
C
CH2=CH–OH
D
CH2=CH–CH2–OH
26
A
B
C
D
27
Aromatization in alkane can be brought using :-
A
B
C
D
28
Geometrical isomerism is not shown by;
A
(1)
B
(2)
C
CH2=C(Cl)CH3
D
CH3–CH=CH–CH=CH2
29
For the given compound, the correct statements is/are; A. Total number of stereoisomers possible for the compound given above are 8. B. Total number of stereoisomers possible for the compound given above are 4. C. There are 2 chiral centers present in the compound given above.
A
A, B and C
B
A and B
C
Only A
D
A and C
30
A
B
C
D
31
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): The IUPAC name of the given compound is 3-Ethyl-4,4-dimethylheptane. Reason (R): The numbering during IUPAC naming is done in such a way that the branched carbon atoms get the highest possible numbers. 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.
32
A
5-Vinyloct-3-en-1- al
B
4-Butylhexa-2, 5-dien-1-al
C
5-Vinyloct-5-en-8-al
D
3-Butylhexa-1, 4-dien-8-al.
33
Inductive effect involves;
A
displacement of σ-electrons
B
delocalisation of π-electrons
C
delocalisation of σ and π-electrons
D
displacement of π-electrons
34
A
B
C
D
35
m-Dichlorobenzene and p-Dichlorobenzene are;
A
geometrical isomers
B
functional isomers
C
position isomers
D
chain isomers
36
The number of structural isomers possible with the molecular formula C₄H₁₁N is
A
4
B
7
C
6
D
8
37
A
5
B
6
C
7
D
8
38
Which is most basic among the following?
A
CH3CH2CH2NH2
B
Cl–CH2CH2NH2
C
O2N–CH2CH2–NH2
D
F–CH2CH2–NH2
39
Identify the most stable conformer of 2-fluoroethanol among the following?
A
(1)
B
(2)
C
(3)
D
(4)
40
Correct order of acidic strength
A
B
C
D
Both (2) & (3)
41
A
B
C
D
42
The IUPAC name of CH3–CO–CH2–CH(OH)–CHO is :
A
5-oxo-4-hydroxy-2-pentanone
B
4-hydroxy-5-al-2-pentanone
C
2-Hydroxy-4-oxopentanal
D
1-Al-4-oxo-2-pentanol
43
The number of carbon atoms present in the principal carbon chain of the given compound are;
A
3
B
4
C
5
D
6
44
In which of the following molecules all the effects namely inductive, mesomeric and hyperconjugation operate?
A
(1)
B
(2)
C
(3)
D
(4)
45
The most stable carbocation among the following is.
A
B
C
D
46
A
3
B
4
C
5
D
6
47
The correct acidity order of the following is;
A
III > IV > II > I
B
IV > III > I > II
C
III > II > I > IV
D
II > III > IV > I
48
Match List I with List II
A
1-Chloropropane
B
Butanamide
C
Butan-2-amine
D
Propanoyl chloride
49
A
B
C
D
50
A
B
C
D
51
A
d
B
ℓ
C
meso
D
All
52
Given below are two statements: Statement I: The compounds given below are position isomers. Statement II: When two or more compounds differ in the position of substituent atom or functional group on the carbon skeleton, they are called position isomers. In the light of the above statements, choose the correct answer from the options given below:
A
Statement I is incorrect, but Statement II is correct.
B
Statement I is correct, but Statement II is incorrect.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
53
All of the following compounds can not show geometrical isomerism, except
A
2-Methylpropene
B
Pent-1-ene
C
Pent-2-ene
D
2,3-Dimethylbut-2-ene
54
The functional group present in pentan-1-amide is;
A
–NC
B
–CN
C
–CONH2
D
–CH2NH2
55
A student named a certain compound as 3, 4-dipropylhexane. Its correct IUPAC name is;
A
4, 5-diethyloctane
B
4-ethyl-5-propylheptane
C
5-propyl-4-ethylheptane
D
3,5-diethyloctane
56
What is the IUPAC name of the following compound?
A
6-Oxohexanoic acid
B
6-Oxohexanal
C
6-Oxohexanone
D
1,2-Dioxohexanol
57
Which one is the correct order of acidity?
A
CH≡CH > CH3–C≡CH > CH2=CH2 > CH3–CH3
B
CH≡CH > CH2=CH2 > CH3–C≡CH > CH3–CH3
C
CH3–CH3 > CH2=CH2 > CH3–C≡CH > CH≡CH
D
CH2=CH2 > CH3–CH=CH2 > CH3–C≡CH > CH≡CH
58
Total number of structural isomers possible for C3H6 are;
A
2
B
1
C
4
D
3
59
A
B
C
D
60
In following compounds the correct order of basicity is?
A
I > III > II
B
I > II > III
C
III > II > I
D
III > I > II
61
A
B
C
D
62
Which of the following compound is aromatic in nature?
A
B
C
D
63
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): IUPAC name of CH3CH2C≡CH is but-1-yne. Reason (R): IUPAC name of CH2=CHCH2C≡CH is pent-5-en-1-yne. 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.
64
has the IUPAC name;
A
2-sec butylbutanal
B
2,3-diethylbutanal
C
2-ethyl-3-methylpentanal
D
3-methyl-2-ethylpentanal