If two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in whole number ratio.
(a) Is this statement true?
(b) It yes, according to which law?
(c) Give one example related to this law.

Explanation

(a) Yes, the given statement is true.
(b) According to the law of multiple properties.
( c) Hydrogen and oxygen combine to form water: `(H_(2)O)` and hydrogen peroxide `(H_(2)O_(2))` as:
`underset(2 g)(H_(2)) + underset(16 g)(1/2O_(2)) to underset("water 18g")(H_(2)O)`
`underset(2 g)(H_(2)) + underset(32 g)O_(2) to underset("Hydrogen peroxide= 34 g")(H_(2)O_(2))`
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 (2 g) are in the ratio, 16 : 32 or 1 : 2. This is a simple whole number ratio.