Question

What is the equivalent weight of a hydride of a metal if the equivalent weight of its oxide is 20 g?

• A. 10 g
• B. 11 g
• C. 12 g
• D. 13 g

Answer 1

The correct option is D 13 g

Given, equivalent weight for the metal oxide = 20 g
Since n-factor $\left(n_f\right)$ of oxygen atom is 2
So, the equivalent weight of O atom = $\frac{molarmass}{n_f}=\frac{16}{2}=8$
$\therefore$ equivalent weight of metal = 20 - 8 = 12 g
Also, equivalent weight of H atom = $\frac{molarmass}{n_f}=\frac{1}{1}=1$
$\therefore$ The equivalent weight of metal hydride = 12 + 1 = 13 g