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Fuel

A substance s...

Question

A substance should reach its ignition temperature to undergo combustion.

A

False

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B

True

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Solution

The correct option is B True

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If ignition temperature of a substance is lower than room temperature then it will undergo spontaneous combustion.

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Q. Substances having high ignition temperature generally burn by spontaneous combustion.

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Q. Fill in the blanks using the words given in the box.

ignition, petrol, combustion, calorific value, combustible, inflammable

(a) A chemical process in which a substance reacts with oxygen to give off heat is called ______.
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(c) The lowest temperature at which a substance catches fire is called its ______ temperature.
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(e) The substances which have very low _______ temperature and can easily catch fire with a flame are called _______ substances.
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