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Combustion Reactions

Burning Ca ...

Question

Burning $C a$ in air give $C a_{3} N_{2}$ as the major side product because:

A

air contains oxygen and nitrogen only

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B

percentage of nitrogen gas in air is maximum

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C

oxygen is inert in atmosphere

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D

none of these.

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Solution

The correct option is B percentage of nitrogen gas in air is maximum
Air consists of 29% oxygen and 71% air. The reaction that occurs when $C a O$ is burnt in air is given below.
$2 C a + O_{2} \to 2 C a O 3 C a + N_{2} \to {C a}_{3} N_{2}$
The reason behind this is that percentage of Nitrogen in air is high.

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