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Class 11
Chemistry :-Additional Questions_ Set - 1 - Some Basic Concepts Of Chemistry.

 Nitrogen forms various oxides as given below:
a. Identify the law of chemical combina­tion illustrated by these data?
b. Determine the formula of each ratio from the given data. (Hint: Formula of first oxide is NO)

OxidesMass of N2(g)Mass of O2(g)
oxide I1416
oxide II1432
oxide III2816
oxide Iv2848

Answer:

a. Law of multiple proportion. It states that when two elements combine to form more than one compound the different masses of one element com­bining with fixed mass of the other bear a simple ratio.
b.The ratio between oxygen of I and II oxides is 1:2, simple ratio.
Formula of oxide II – NO2 Formula of oxide III – N2O – 2:1 Formula of oxide IV – N2O3 – 2:3

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NCERT Chemistry Class 11

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