Question

how will you show that air is necessary for combustion?​

Answer 1

Answer:

When the burning candle is covered with gas jar, then the candle takes away the oxygen necessary for burning from the air enclosed in the gas jar. This proves that air is necessary for combustion of substances.

Explanation:

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Answer 2

Answer:

When the burning candle is covered with gas jar, then the candle takes away the oxygen necessary for burning from the air enclosed in the gas jar. ... This proves that air is necessary for combustion of substances.

Explanation:

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