Question

state law of multiple proportions and definite proportions and their limitations

Answer 1

The Law of Multiple proportions 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.

Limitation:-

The Law of Multiple proportions is valid till an element is present in one particular isotopic form in all its compounds. When an element exists in the form of different isotopes in its compounds, the Law of Multiple proportions does not hold well.

The Law of definite proportions:- every chemical compound contains fixed and constant proportions (by mass) of its constituent elements.

Limitation:-

The above-given law is not applicable if the two elements combine in the same ratio and form different compounds. This law is also not true if the elements with different isotopes react to give a chemical compound.