The lowest temperature at which a combustible substance catches fire when heated in air is called its ignition temperature.

True

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False

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Solution

The correct option is A True
Ignition temperature
The minimum temperature at which a fuel must be heated so that it may catch fire and start burning, is called the Ignition temperature of the fuel.
Different fuels have different ignition temperatures.
Below the ignition temperature the fuel would not be able to catch fire.
Hence the lowest temperature at which a combustible substance catches fire when heated in air is called its ignition temperature.
Therefore, the given statement is true.

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

(c) The __________ temperature at which a substance catches fire is called its ignition temperature.

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

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Fill in the blanks in the following sentences.
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