Question

The ratio of weight of oxygen that combines with a fixed weight of an element X to form compounds A and B is 1 : 2. If the valency of element X is 1 in both cases, what could be the formulae of compounds A and B?

Answer 1

Weight of oxygen in first case is $x$ gm means $y$ gm of metal combines with it to give formula

$X^{+}+O_2^{2-}\to X_2{O}_2\to XO$

Second case $2x$ gm oxygen combines with $y$ gm metal.

Formula is $X{O}_2$

$X^{+}+O_2^{-}\to X{O}_2$