Question

The specific heat of a metal is 0.11 and its equivalent weight is 18.61. Its exact atomic weight is

(a) 58.2

(b) 29.1

(c) 55.83

(d) 27.91

Answer 1

Correct option is (c) 55.83

Approximate atomic weight \(= \frac{6.4}{\text{sp.heat}} \)

\(= \frac{6.4}{0.11} \approx 58.2\)

Valency of the element = \(\frac{\text{At. wt.}}{\text{Eq. wt.}} = \frac{58.2}{18.61} = 3\)

Exact atomic weight = Valency x Eq. wt.

= 3 x 18.61 

= 55.83