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Chemistry
d and f block Elements
7 questions · Click an option and press Check Answer to reveal the result
1
Which of the following compounds is not coloured:
A
Na2[CuCl4]
B
Na2[CdCl4]
C
K4[Fe(CN)6]
D
K3[Fe(CN)6]
2
The order of stability of complexes of ion Cu+2, Ni+2, Mn+2 and Fe+2 decreases in the order -
A
Cu+2 > Ni+2 > Fe+2 > Mn+2
B
Mn+2 > Ni+2 > Cu+2 > Fe+2
C
Ni+2 > Cu+2 > Fe+2 > Mn+2
D
Fe+2 > Ni+2 > Cu+2 > Mn+2
3
Which one of the following transition elements does not exhibit variable oxidation state ?
A
Ni
B
Cu
C
Fe
D
Sc
4
The correct order of basicity of oxides of vanadium is
A
V2O5 > V2O4 > V2O3
B
V2O4 > V2O3 > V2O5
C
V2O3 > V2O5 > V2O4
D
V2O3 > V2O4 > V2O5
5
The colour of light absorbed by an aqueous solution of CuSO4 is
A
orange-red
B
blue-green
C
yellow
D
violet
6
Which of the following statement is correct :
A
Due to lanthanide contraction size of 3d series elements ≈ 4d series element
B
Due to lanthanide contraction size of 4d series elements ≈ 5d series element.
C
Due to lanthanide contraction size of 3d series elements < 5d series element
D
Due to lanthanide contraction size of 5d series element > 4d series elements.
7
Given below are two statements
Statement I: Sc exhibits only +3 oxidation state
Statement II: Mn exhibits all the oxidation states from +2 to +7
In the light of above statements, choose the most appropriate answer from the options given below.
A
Both statement I and statement II are correct.
B
Both statement I and statement II are incorrect.
C
Statement I is correct but statement II is incorrect.
D
Statement I is incorrect but statement II is correct.
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