All Practice Exams
0 of 7 answered
Chemistry
d and f block Elements
7 questions · Click an option and press Check Answer to reveal the result
1
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
2
A
B
C
D
3
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.
4
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
D
Due to lanthanide contraction size of 5d series element > 4d series elements.
5
A
B
C
D
6
Which of the following compounds is not coloured:
A
B
C
D
7
Which one of the following transition elements does not exhibit variable oxidation state ?
A
Ni
B
Cu
C
Fe
D
Sc