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

Chief air pollutant which is likely to deplete ozone layer

Question # 2

Drawback DDT as presticide is

Question # 3

Oceans cove ______ percent of the surface of the earth

Question # 4

Most hazardous metal pollutant of automobile exhaust is

Question # 5

Atmosphere of big/metropolitan cities is polluted most by

Question # 6

Chromium (VI) is highly toxic and can cause

Question # 7

The % of CO2is the atmosphere is

Question # 8

Phosphate pollution is caused by

Question # 9

DDT is

Question # 10

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

Question # 11

Swage water is purified by

Question # 12

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 13

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

Question # 14

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

Question # 15

Soil remediation means

Question # 16

A pollutant affects

Question # 17

SO2Makes ______ acid rains

Question # 18

Ecosystem is a smaller unit of

Question # 19

UV radiations bring about

Question # 20

As it passes into food chain, the concentration of DDT

Question # 21

NO and NO2gases in atmosphere are represented by

Question # 22

Chloroflurocarbon releases a chemical harmful to ozone

Question # 23

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

Question # 24

B.O.D is connected with

Question # 25

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 26

The largest item which is recycled is

Question # 27

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

Question # 28

Photochemical smog is caused by

Question # 29

Chromium (VI) is highly toxic and can cause

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above
2 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
3 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
4 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
5 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
6 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
7 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
8 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
9 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
10 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution

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