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

As it passes into food chain, the concentration of DDT

Question # 2

Which step is unnecessary for purification of water for drinking purposes

Question # 3

Which heavy metals do not have any safe limits

Question # 4

Chief air pollutant which is likely to deplete ozone layer

Question # 5

The pH range of the acid rain is

Question # 6

Chromium (VI) is highly toxic and can cause

Question # 7

Burning of fossil fuels is the main source of pollution

Question # 8

Drained sewage has B.O.D

Question # 9

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 # 10

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

Question # 11

Most hazardous metal pollutant of automobile exhaust is

Question # 12

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

Question # 13

Swage water is purified by

Question # 14

Chloroflurocarbon releases a chemical harmful to ozone

Question # 15

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

Question # 16

Polycyolic aromatic hydrocarbons are taught to be

Question # 17

Acid rains are produced by

Question # 18

UV radiations bring about

Question # 19

Which of the following waste material is not recycled for use again

Question # 20

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

Question # 21

Which one is the most toxic?

Question # 22

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 23

Which factor is helping to reduce the environmental pollution

Question # 24

SO2Makes ______ acid rains

Question # 25

Water which his considered to be safe for human consumption is known as

Question # 26

Atmosphere of big/metropolitan cities is polluted most by

Question # 27

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

Question # 28

Classical smog occurs in palces of

Question # 29

In the atmosphere, CO2is about

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
2 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
3 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
4 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
5 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
6 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
7 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
8 Soil remediation means
A. To make it suitable for cultivation of crops
B. To make it acidic
C. To make it alkeline
D. To add manure into it
9 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
10 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2

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