Question

$0.5g$ of a metal on oxidation gave $0.79g$ of its oxide.The equivalent mass of the metal is:

• A. $10$
• B. $14$
• C. $20$
• D. $40$

Answer 1

The correct option is B $14$

The weight of element = 0.5 g

Weight of oxide = 0.79 g

Weight of oxygen = 0.29 g

0.29 g of oxygen combines with 0.5 g of elements.

8g of oxygen combines with $\left(\frac{0.5}{0.29}\right)\times 8g=13.73g$ or $14g$.