Transition Elements (General Introduction, Electronic Configuration,...) NEET Questions

Transition Elements (General Introduction, Electronic Configuration,...) MCQ Questions

13.
In potassium dichromate, oxidation state of Cr is
A.
6
B.
3
C.
2
D.
4
ANSWER :
A. 6
14.
Which of the following is used in breathalyser to detect alcohol?
A.
KMnOâ‚„
B.
K₂Cr₂O₇
C.
CuSOâ‚„
D.
Pb(NO₃)₂
ANSWER :
B. K₂Cr₂O₇
15.
In which of the following transition metals is the enthalpy of atomization maximum?
A.
Fe
B.
Ni
C.
Cr
D.
Mn
ANSWER :
C. Cr
16.
Which element is used for hardening of steel?
A.
Mn
B.
Zn
C.
Cu
D.
Al
ANSWER :
A. Mn
17.
Which compound gives purple colour in solution?
A.
KMnOâ‚„
B.
K₂Cr₂O₇
C.
CuSOâ‚„
D.
NiClâ‚‚
ANSWER :
A. KMnOâ‚„
18.
Which transition metal forms the largest number of complexes?
A.
Ni
B.
Fe
C.
Cu
D.
Cr
ANSWER :
B. Fe