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Solved CBSE Class 8 Science Chapter 18 Assertion and Reason Questions – Pollution of Air and Water. 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 18 Pollution of Air and Water
1.) Assertion- the potable water is used for daily house cleaning work.
Reason- the water which purified and fit for drinking is known as potable water.
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
2.) Assertion- An ambitious plan to save the river called Ganga Action Plan was launched in 1985.
Reason- the aim of this plan is to reduce the pollution levels in the river.
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 B
3.) Assertion- the harmful substance like sewage, toxic chemicals, slit etc. get mixed with water and become water polluted.
Reason- the substances which make water polluted are known as water pollutants.
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 average temperature of the earth’s atmosphere is gradually increasing is called Global warming.
Reason- the gases like methane , NO2, and water vapour also contribute towards the effect called Green house effect.
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 B
5.) Assertion- CFC are useful for atmosphere.
Reason- CFCs are used in the AC, refrigerators , aerosol sprays and hamful for the ozone layers.
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.
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