1.

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.(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.​

Answer» 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.

(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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