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Solved CBSE Class 8 Science Chapter 6 Assertion and Reason Questions – Combustion and Flame. Here we (Net Explanations) working very hard to providing you with the Important Assertion Reason Questions for this Chapter.
Assertion and Reason Questions Class 8 Science Chapter 6 Combustion and Flame
1.) Assertion – Magnesium and charcoal are combustible substances.
Reason – a chemical process in which a substance reacts with oxygen to give off heat is called combustion.
a) Assertion and reason both are correct statement and reason is correct explanation for assertion.
b) Assertion and reason both are correct statement and reason is not correct explanation for assertion.
c) Assertion is correct statement but reason is wrong statement.
d) Assertion is wrong statement but reason is correct statement.
Ans- Option A
2.) Assertion- match stick does not catch fire on it’s own at room temperature.
Reason- the head of the safety match contains only antimony tisulphide and potassium chlorate.
a) Assertion and reason both are correct statement and reason is correct explanation for assertion.
b) Assertion and reason both are correct statement and reason is not correct explanation for assertion.
c) Assertion is correct statement but reason is wrong statement.
d) Assertion is wrong statement but reason is correct statement.
Ans- Option A
3.) Assertion- the LPG can catch fire easily.
Reason- LPG have low ignition temperature OR LPG are inflammable substances.
a) Assertion and reason both are correct statement and reason is correct explanation for assertion.
b) Assertion and reason both are correct statement and reason is not correct explanation for assertion.
c) Assertion is correct statement but reason is wrong statement.
d) Assertion is wrong statement but reason is correct statement.
Ans- option A
4.) Assertion the amount of heat energy produced on complete combustion of 500 gm of fuel is known as Calorific value.
Reason- the calorific value of A) hydrogen is 150000 B) methane is 50000
a) Assertion and reason both are correct statement and reason is correct explanation for assertion.
b) Assertion and reason both are correct statement and reason is not correct explanation for assertion.
c) Assertion is correct statement but reason is wrong statement.
d) Assertion is wrong statement but reason is correct statement.
Ans- option D
5.) Assertion – water can be used to control fire equipment or oil.
Reason- water is commonly used to control fire.
a) Assertion and reason both are correct statement and reason is correct explanation for assertion.
b) Assertion and reason both are correct statement and reason is not correct explanation for assertion.
c) Assertion is correct statement but reason is wrong statement.
d) Assertion is wrong statement but reason is correct statement.
Ans- option D
6.) Assertion- Acid rain is harmful for the crops, buildings and soil.
Reason- the PH of Acid rain is 4.
a) Assertion and reason both are correct statement and reason is correct explanation for assertion.
b) Assertion and reason both are correct statement and reason is not correct explanation for assertion.
c) Assertion is correct statement but reason is wrong statement.
d) Assertion is wrong statement but reason is correct statement.
Ans- option A
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