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

A pollutant affects

Question # 2

Ecology is a science of environment and deals specially with

Question # 3

Which is not the affect of polluted air on environment

Question # 4

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

Question # 5

Which one is not a pollutant normally?

Question # 6

Soil salinity can be measured by

Question # 7

Increasing skin cancer and high mutation rate are due to

Question # 8

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

Question # 9

Chief air pollutant which is likely to deplete ozone layer

Question # 10

Which heavy metals do not have any safe limits

Question # 11

Atmosphere of big/metropolitan cities is polluted most by

Question # 12

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 13

Oceans cove ______ percent of the surface of the earth

Question # 14

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 15

Eutrophication causes reduction in

Question # 16

B.O.D is connected with

Question # 17

Most hazardous metal pollutant of automobile exhaust is

Question # 18

Swage water is purified by

Question # 19

In Antarctica ozone depletion is due to the formation of following compound

Question # 20

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

Question # 21

In the atmosphere, O2is about

Question # 22

Ozone hole refers to

Question # 23

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 24

Which one of the following is not air pollutant gas

Question # 25

Which is not a method for solid waste management

Question # 26

Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water

Question # 27

Which of the following human activities are contaminating surface and ground waters

Question # 28

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 29

Shahi Qilla may be destroyed by

Question # 30

The pH of the rain water in areas where acid rain is the cause of pollution may be

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
2 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
3 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
4 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
5 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
6 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
7 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these
8 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
9 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
10 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost

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