Question

4 g of a metal oxide contains 1.6 g oxygen, then equivalent mass of the metal is:

• A. $3.2$
• B. $24$
• C. $12$
• D. $20$

Answer 1

The correct option is C $12$

Mass of metal$=(4-1.6)g$

We know that:

Mass of metal/mass of oxygen=Equivalent weight of metal/Equivalent weight of oxygen

$\frac{4-1.6}{1.6}=\frac{x}{\frac{16}{2}}$ Eq Wt of $O_2=\frac{At.Wt}{Valency}$

$\Rightarrow x=\frac{2.4}{1.6}\times 8$

$\Rightarrow x=12g$

Equivalent weight of metal is $12g$ .

Hence, option $C$ is correct.