Ammonia (NH 3 ) obtained from different sources always has same propor

Ammonia (NH₃) obtained from different sources always has same proportion of Nitrogen and Hydrogen. It proves the validity of law of:

Reciprocal proportion

Constant proportion

Multiple proportions

None of the above

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This question was previously asked in

UPSC NDA-2 – 2015

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The statement “Ammonia (NH₃) obtained from different sources always has same proportion of Nitrogen and Hydrogen” is a direct application of the Law of Constant Proportions (also known as the Law of Definite Proportions). This law states that a given chemical compound always contains its component elements in fixed proportion by mass, regardless of the source or method of preparation.

The Law of Constant Proportions explains why the elemental composition of a specific compound is always the same.

The Law of Reciprocal Proportion relates the masses of two elements that combine separately with a fixed mass of a third element. The Law of Multiple Proportions states that if two elements can combine to form more than one compound, then the masses of one element that combine with a fixed mass of the other element are in the ratio of small whole numbers. The given statement specifically addresses the fixed composition of a single compound, which is the domain of the Law of Constant Proportions.

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