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Question

___ is required for a match stick to catch fire.

A

Ignition temperature

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B

Water

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C

Carbon dioxide

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D

Carbon monoxide

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Solution

The correct option is A Ignition temperature
Matchstick, a piece of wood. tank of petrol etc., fail to catch fire on their own even though they are combustible substances. This is because the ignition temperature of these substances is much higher than that of room temperature. It can catch fire only when its temperature is raised to its ignition temperature.

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Q. A substance which has very low ignition temperature and can easily catch fire with a flame is called _________.

Q. Question 9
Choose the correct statement about inflammable substances from the following.They have:

(a) low ignition temperature and cannot catch fire easily
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(d) high ignition temperature and cannot catch fire easily.

Q. The ignition temperature is the maximum temperature at which a substance catches fire.

Q. Question 16
Fill in the blanks in the following sentences.
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(b) When the clothes of a person catch __________, the person is covered with a __________ to extinguish fire.

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(e) The substances which vapourise during __________, give flame.

Q. Fill in the blank: A substance with a very low ignition temperature can catch fire easily. Such a material is called a ___________ material.

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