Properties of elements X:
(i) Its amide is used as a reducing agent
(ii) Its amalgam is used as reducing agent
Properties of element Y:
(i) It is an octaatomic molecule
(ii) It is diamagnetic in ground state but paramagnetic in vapour phase
Properties of element Z:
(i) Its diatomic molecule is paramagnetic
(ii) Its allotrope is an absorber of UV radiation
(iii) IT supports combustion
Compound of X and Z + Compound of Y and Z `rarr` product(s).
Oxidation number of Y in the final compound may be:
A. `+4` or `+6`
B. 0 and `+2`
C. `+3` and `+5`
D. `-2` and `+4`
