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Q.

Which of the following gas is essential for combustion? 

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a

Hydrogen gas

b

Nitrogen gas

c

Carbon dioxide gas

d

Oxygen gas

answer is C.

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Detailed Solution

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Oxygen gas is essential for combustion.

A chemical process in which a substance reacts with oxygen to give off heat is called combustion. So oxygen is essential for combustion. Nitrogen, hydrogen, and carbon dioxide gas do not support combustion. Hence the correct answer is - Oxygen gas.

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Which of the following gas is essential for combustion?