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Question

Fill in the blanks:


The lowest temperature at which a substance catches fire is called its
__________________ temperature.

Solution
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The lowest temperature at which a substance catches fire is called its $$ignition$$ temperature.

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Q1

Fill in the blanks:


The lowest temperature at which a substance catches fire is called its ___________ temperature.

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Q2

The lowest temperature at which a substance catches fire is called its:


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Q3
Fill in the blanks in the following sentences.​
(a) A ____________ process in which a substance reacts with__________ to give off heat is called combustion.​
(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 __________ temperature.
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(e) The substances which vapourise during __________, give flame.​
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Q4
Question 16
Fill in the blanks in the following sentences.
(a) A ____________ process in which a substance reacts with __________ to give off heat is called combustion.

(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.

(d) The substances which have very ________________ ignition temperature and can easily catch fire with a flame are called __________ substances.

(e) The substances which vapourise during __________, give flame.
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Q5
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 ______.​
(b) Wood, paper, CNG are __________ substances.
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(d) Ignition temperature of _______ is lower than that of wood.
(e) The substances which have very low _______ temperature and can easily catch fire with a flame are called _______ substances.
(f) The amount of heat energy produced on complete combustion of 1kg of a fuel is called its ______.
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