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

Correct option is (b) 3

Answer 2

Correct option is (b) 3

Vapour density  \(=\cfrac{\text{molecular wt.}}{2}\)

\(59.25=\frac M2\)

\(M=59.25\times2\)

Let say n-factor of element = n.

\(\therefore\) \((4\times n+n\times35.5)=59.25\times2\)

\(n\times39.5=118.5\)

\(\therefore\) n = 3.