Question

The equivalent weight of an element is $4$. Its chloride has a vapour density $59.25$. Then, the valency of the element is:

• A. 4
• B. 3
• C. 2
• D. 1

Answer 1

The correct option is B 3

Molecular weight $=2\times$Vapour density $=2\times 59.25=118.5$

Also, molecular weight $=x\times 4+x\times 35.5=118.5$; (where $x$ is the valency of the element)

On solving, we get $x$ $=3$.