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Important Questions Test: Pollution Of Air And Water


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20 Questions MCQ Test Science Class 8 | Important Questions Test: Pollution Of Air And Water

Important Questions Test: Pollution Of Air And Water for Class 8 2023 is part of Science Class 8 preparation. The Important Questions Test: Pollution Of Air And Water questions and answers have been prepared according to the Class 8 exam syllabus.The Important Questions Test: Pollution Of Air And Water MCQs are made for Class 8 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Important Questions Test: Pollution Of Air And Water below.
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Important Questions Test: Pollution Of Air And Water - Question 1

The Taj Mahal is being affected due to:

Important Questions Test: Pollution Of Air And Water - Question 2

Highest percentage of air consists of:

Important Questions Test: Pollution Of Air And Water - Question 3

Most polluted river in the world is:

Important Questions Test: Pollution Of Air And Water - Question 4

Air pollution causes

Detailed Solution for Important Questions Test: Pollution Of Air And Water - Question 4

Pollution is known to cause and exacerbate a number of chronic respiratory diseases. The World Health Organisation has placed air pollution as the world’s largest environmental health risk factor. There has been recent publicity about the role for diet and anti-oxidants in mitigating the effects of pollution, and this review assesses the evidence for alterations in diet, including vitamin supplementation in abrogating the effects of pollution on asthma and other chronic respiratory diseases. 

Important Questions Test: Pollution Of Air And Water - Question 5

Which of the following is not a greenhouse gas?

Detailed Solution for Important Questions Test: Pollution Of Air And Water - Question 5

A greenhouse gas is a gas that produces heat in the atmosphere as it increases. It also gets stuck in the environment and can not leave the internal layer of the Earth’s atmosphere. These gases introduce pollution because they contaminate the environment.

Examples for greenhouse gases: Carbon dioxides, Methane, Chlorofluorocarbon, sulfur dioxide.

Whereas oxygen, nitrogen, and argon are not examples of greenhouse gases.

Important Questions Test: Pollution Of Air And Water - Question 6

The percentage of nitrogen in air is

Important Questions Test: Pollution Of Air And Water - Question 7

Ganga Action Plan was launched to reduce the pollution levels in the

Important Questions Test: Pollution Of Air And Water - Question 8

Which of these are responsible for water pollution?

Important Questions Test: Pollution Of Air And Water - Question 9

 CNG is a

Important Questions Test: Pollution Of Air And Water - Question 10

Chlorofluorocarbon is used in

Detailed Solution for Important Questions Test: Pollution Of Air And Water - Question 10

D is the correct option.Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants and Air conditioners.

Important Questions Test: Pollution Of Air And Water - Question 11

Ganga Action Plan aims to reduce cutting of trees.

Important Questions Test: Pollution Of Air And Water - Question 12

 Corrosion of marble is also known as marble cancer.

Detailed Solution for Important Questions Test: Pollution Of Air And Water - Question 12

A is the correct option.The acids present in the acid rain react with the marble of monument and corrode it slowly. The slow corrosion (or eating up) of marble of a monument by acid rain is known as Marble cancer. ... These acids mix with rain and cause acid rain. This corrodes the marble of the monuments.

Important Questions Test: Pollution Of Air And Water - Question 13

Global warming is a serious threat for life on earth.

Important Questions Test: Pollution Of Air And Water - Question 14

 Carbon monoxide is a green house gas.

Important Questions Test: Pollution Of Air And Water - Question 15

 Potable water is translucent.

Detailed Solution for Important Questions Test: Pollution Of Air And Water - Question 15

because potable water is safe to drink and it is transparent.

Important Questions Test: Pollution Of Air And Water - Question 16

Carbon monoxide reduces the oxygen, carrying capacity of the blood.

Important Questions Test: Pollution Of Air And Water - Question 17

Acid rain corrodes the marble of monuments.

Important Questions Test: Pollution Of Air And Water - Question 18

Acid rain does not affect the soil and plants.

Important Questions Test: Pollution Of Air And Water - Question 19

Increasing levels of greenhouse gases like CO2 causes global warming.

Important Questions Test: Pollution Of Air And Water - Question 20

Sun’s rays do not warm the earth’s surface.

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