State and explain Law of Multiple proportions with the help of an example.

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Solution

Law of Multiple proportion states that when two elements combine to form more than one compound, the mass of one element, which combines with a fixed mass of the other element, will always be ratios of whole numbers.

For example, let us assume 2 molecules CO (carbon monoxide) and $C O_{2}$ (carbon dioxide).

$C O$ = 12gm of carbon + 16 grams of Oxygen.

$C O_{2}$ = 12gm carbon+ 32 grams of Oxygen.

The ratio of the mass of oxygen in the given two compounds is 16:32=1:2.
Thus law of multiple proportions is proved.

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