Question

Choose the correct option-

Identify the odd one out with respect to valency.

• A. Sulphide
• B. Oxide
• C. Zincate
• D. Carbide

Answer 1

The correct option is D

Carbide

Valency - Atoms combine in a fixed proportion to form a molecule or compound because of their different combining capacity .This combining capacity of an atom is known as its valency.

Ion/ Radical	Valency
Sulphide $({\mathrm{S}}^{-2})$	Divalent
Oxide $\left({\mathrm{O}}^{-2}\right)$	Divalent
Zincate $({{\mathrm{ZnO}}_2}^{-2})$	Divalent
Carbide $\left({\mathrm{C}}^{-4}\right)$	Tetravalent

Explanation for the correct option - Carbide has - 4 valencies.

Explanation for the incorrect option - Sulphide, Oxide and Zincate have -2 valencies.

Therefore option (d) carbide is correct.