Monday, 15 November 2021

Class 8 Science - Pollution in Air and Water (MCQs) #class8Science #environment #pollution #eduvictors

Pollution in Air and Water (MCQs)

Class 8 Science

Class 8 Science - Pollution in Air and Water (MCQs) #class8Science #environment #pollution #eduvictors

Q1: In general, oxides of non metals are ________ in nature?

(a) basic

(b) acidic

(c) neutral

(d) amphoteric



Q2: The percentage of which of the following components of air always varies from one place to the other?

(a) O₂ 

(b) N₂ 

(c) Water vapour 

(d) CO₂


Q3: Which of the following is not a green house gas?

(a) Carbon dioxide

(b) Sulphur dioxide

(c) Methane

(d) Nitrogen



Q4: The average composition of Oxygen by volume in air is?

(a) 21%

(b) 4%

(c) 78%

(d) 30%



Q5: Which of the following gas is the main cause for acid rain?

(a) CO₂

(b) SO₂

(c) N₂

(d) He



Q6: Which of the following is mainly responsisble for depletion of ozone layer?

(a) Nitrogen gas

(b) Argon

(c) Coal

(d) CholoroFluoro Carbons


Q7: A gas which is combustible and can support combustion is?

(a) oxygen

(b) nitrous oxide

(c) nitric oxide

(d) carbon monoxide


Q8: The term “biomagnification” refers to

(a) growth of organism due to food consumption.

(b) increase in population size.

(c) increase in the concentration of non-degradable pollutants as they pass through food chain.

(d) decrease in population size.



Q9: A chemical method used for killing germs in water is:

(a) Filtration

(b) Decantation

(c) Chlorination 

(d) Loading



Q10: Which among the following is a biodegradable pollutant? 

(a) DDT

(b) domestic waste 

(c) aluminium foil 

(d) fertlizers



Q11: Which among the follwing is considered as cleaner fuel?

(a) Coal

(b) Cown Dung Cakes

(c) LPG

(d) Wood



Q12: Alternative to fossil fuel to reduce pollution: 

(a) Solar energy 

(b) Hydro power

(c) Wind energy 

(d) All of these



Q13: Most abundant water pollutant is

(a) Detergent 

(b) Industrial waste

(c) Pesticide 

(d) Oil spill



Q14: Which of the following is the result of global warming?

(a) Change in rainfall patterns.

(b) Rise in sea land.

(c) Water evaporation form water bodies.

(d) All of these.



Q15: Taj Mahal is threatened (causing marble cancer) due to the effect of

(a) hydrogen 

(b) oxygen

(c) chlorine 

(d) sulphur dioxide



Answers:

1. (b) acidic

2. (c) Water vapour 

3. (d) Nitrogen

4: (a) 21%

5: (b) SO₂

6: (d) CholoroFluoro Carbons

7: (a) oxygen

8: (c) increase in the concentration of non-degradable pollutants as they pass through food chain.

9: (c) Chlorination 

10: (b) domestic waste

11: (c) LPG

12: (d) All of these

13: (b) Industrial waste

14: (d) All of these.

15: (d) sulphur dioxide


👉See Also:

Ch 18 - Pollution of Air and Water (NCERT Solutions)
Ch 18 - Pollution of Air and Water (Chapter Study Notes)
Ch 18 - Pollution of Air and Water (Worksheet)

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