Give reasons:
A candle brought near the mouth of a jar containing hydrogen gas starts burning but is extinguished when pushed inside the jar.

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Solution

A candle starts burning when it is brought near the mouth of a jar containing hydrogen because it reacts with oxygen in the air and starts burning as hydrogen is highly combustible in nature.

But it extinguishes when pushed inside the jar because there is no oxygen inside the jar.

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Similar questions

Give reasons :

(a) Hydrogen is collected by the downward displacement of water and not of air, even though it is lighter than air.

(b) A candle brought near the mouth of a jar containing hydrogen gas starts burning but is extinguished when pushed inside the jar.

(d) Apparatus for laboratory preparation of hydrogen should be air tight and away from a naked flame.

Explain why, when a burning candle is covered with an inverted gas jar, the candle gets extinguished after some time.

What will happen to a lighted candle if it is brought near the mouth of a jar containing hydrogen gas?

What will happen to a lighted candle if it is brought near the mouth of a jar containing hydrogen gas ?Represent the reaction

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