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Question

The mass of nitrogen per gram in hydrazine is exactly one and half the mass of nitrogen in the compound ammonia.


The fact illustrates the:

A
law of conservation of mass
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B
multiple valency of nitrogen
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C
law of multiple proportion
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D
law of definite proportion
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Solution

The correct option is C law of multiple proportion
The law of multiple proportions says that, "If two elements form more than one compound between them, then the ratios of the masses of the second element which combine with a fixed mass of the first element will be ratios of small whole numbers".

The ratio of masses of nitrogen per gram of hydrogen in Hydrazine and Ammonia is 1.5:1 = 3:2 which is simple whole-number ratio.
Therefore, it represents the law of multiple proportions.

Option C is correct.

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