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

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Question # 1

Ultraviolet radiation from sun causes a reaction that produces

Question # 2

NO and NO2gases in atmosphere are represented by

Question # 3

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 4

Oceans cove ______ percent of the surface of the earth

Question # 5

As it passes into food chain, the concentration of DDT

Question # 6

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

Question # 7

Classical smog occurs in palces of

Question # 8

Which gas is not a constituent of atmosphere

Question # 9

Pick up the correct statement

Question # 10

Atomospheric pollutant is

Question # 11

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 # 12

Domestic waste mostly constitutes

Question # 13

Acid rains are produced by

Question # 14

Burning of fossil fuels is the main source of pollution

Question # 15

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

Question # 16

Soil salinity can be measured by

Question # 17

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 18

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 19

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 20

Ecosystem is a smaller unit of

Question # 21

BOD is

Question # 22

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 # 23

UV radiations bring about

Question # 24

Mottling of teeth is due to presence of an element in drinking water

Question # 25

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 26

A single chlorine free radical can destroy how many ozone molecules

Question # 27

Environmental pollution affects

Question # 28

A pollutant affects

Question # 29

Fungicides are the pesticides which

Question # 30

Chief source of water and soil pollution is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which is not the affect of polluted air on environment
A. Acid rain
B. Smog
C. Ozone
D. Global warming
2 Sulphur dioxide affects
A. Cell wall
B. Plasmodesmata
C. All membrane systems
D. Nucleus
3 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
4 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
5 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
6 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
7 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
8 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
9 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
10 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

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