ECAT Pre Engineering Chemistry Chapter 27 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

Try The MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

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ECAT Chemistry Chapter 27 Environmental Chemistry

00:00
Question # 1

Which one of the following is not air pollutant gas

Question # 2

The % of CO2is the atmosphere is

Question # 3

Pick up the correct statement

Question # 4

Water is often treated with chlorine to

Question # 5

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 6

Which one is the major reason for pollution in high cities?

Question # 7

Drained sewage has B.O.D

Question # 8

Pollution is

Question # 9

Chloroflurocarbon releases a chemical harmful to ozone

Question # 10

Which is not a method for solid waste management

Question # 11

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 12

Exposure to CO results in

Question # 13

In purification of potable water the coagulant used is

Question # 14

Which one is the most toxic?

Question # 15

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 16

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 17

Ozone hole is maximum over

Question # 18

Result of ozone hole is

Question # 19

Ecosystem is a smaller unit of

Question # 20

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 21

The pH range of the acid rain is

Question # 22

Burning of fossil fuels is the main source of pollution

Question # 23

Chromium (VI) is highly toxic and can cause

Question # 24

The normal amount of overhead ozone is about

Question # 25

Spraying of DDT produces pollution of

Question # 26

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 27

When chlorofluoro carbon are subjected to U.V. they form

Question # 28

B.O.D is connected with

Question # 29

Sulphur dioxide affects

Question # 30

SO2Makes ______ acid rains

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
2 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
3 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
4 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
5 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene
6 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
7 What is the cause of water pollution
A. Chemical and bacterial contents in live stock
B. The spilled oil in rivers and ponds
C. Wide spread use of pesticides
D. All of the above
8 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
9 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
10 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers

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