If two elements can combineto form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in whole number rato.

(a) Is this statement true ?

(b) If yes, according to which this law.

(c) Give one example related to this law.

(a) Yes, the given statement is true.

(b) According to the law of multiple proportions

(c) $\underset{2g}{H_2}+\underset{16g}{\frac{1}{2}{O}_2}⟶\underset{18g}{H_{2}O}\underset{2g}{H_2}+\underset{32g}{O_2}⟶\underset{34g}{H_2{O}_2}$

Here, masses of oxygen, (i.e., 16 g in $H_{2}O$ and 32 g in $H_2{O}_2$) which combine with fixed mass of hydrogen (2g) are in the simple ratio i.e., 16 : 32 or 1 : 2.