Question

Which one of the following oxidation state is exhibited by group 15 element when they reacts with metals?

• A. 0
• B. +3
• C. -5
• D. -3

Answer 1

The correct option is D -3

Reactivity Towards Metals: All these elements react​ with metals to form ​their binary compounds exhibiting -3 oxidation state​.
For example: Calcium nitride $\left(C{a}_3{N}_2\right)$, Calcium phosphide $C{a}_3{P}_2$, Sodium arsenide $\left(N{a}_{3}As\right)$, Lithium antimonide $\left(L{i}_{3}Sb\right)$ etc. Hence option (d) is correct.