Question

$0.24$ g of a metal on heating in air forms $0.40$ g of metal oxide. What is equivalent weight of metal (in g/equivalent)?

• A. $12$
• B. $8$
• C. $6$
• D. None of these

Answer 1

The correct option is A $12$

$0.24$ g of a metal on heating in air forms $0.40$ g of metal oxide.
Thus, the amount of O present in $0.40$ g of metal oxide is $0.40g-0.24g=0.16g$
The equivalent weight of metal is the mass of metal that combines with 8 parts by mass of oxygen.
It is equal to $\frac{0.24}{0.16}\times 8=12g/eq$
Hence, the equivalent weight of metal is $12$ g/equivalent.