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Doctors Medicines MCQs Q&A

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. 

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

(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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1 Answers

(a) combustion, 

(b) combustible, 

(c) ignition, 

(d) petrol, 

(e) ignition, inflammable, 

(f) calorific value.

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