One of the statements of Dalton’s atomic theory is given below: “Compounds are formed when atoms of different elements combine in a fixed ratio” Which of the following laws is not related to this statement?

(i) Law of conservation of mass

(ii) Law of definite proportions

(iii) Law of multiple proportions

(iv) Avogadro law

<p>This is a Multiple Choice Questions as classified in NCERT Exemplar</p><p>Option (A), (D)</p><p>Law of conservation of mass: According to this law, the mass is neither created nor destroyed during a chemical reaction in an isolated system. It can only be transformed from one form to another. Burning of wood is an example of conservation of mass. Law of definite proportion:</p><p>&nbsp;According to this law, a compound contains exactly the same elements in the fixed proportion by mass. For example, pure water consists of 11.196 H and 88.9% o by mass.</p><p>Law of multiple proportion: According to the law of multiple proportion, when two elements react to form two or more than two chemical compounds, the ratio between different masses of one of the elements combining with a fixed mass of the other is always in the ratio of tiny numbers. For example, compounds of carbon and oxygen. Avogadro's law: This law states that the number of moles of a gas is directly related to the volume enclosed by the gas at constant pressure and temperature.</p>

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