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

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

Question # 2

Biodegradable pollutant is

Question # 3

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

Question # 4

UV radiations bring about

Question # 5

Chromium (VI) is highly toxic and can cause

Question # 6

Fungicides are the pesticides which

Question # 7

Soil salinity can be measured by

Question # 8

Atmosphere of big/metropolitan cities is polluted most by

Question # 9

Water is often treated with chlorine to

Question # 10

As it passes into food chain, the concentration of DDT

Question # 11

In the atmosphere, O2is about

Question # 12

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 13

Swage water is purified by

Question # 14

A pollutant affects

Question # 15

Which gasses are produced from landfills

Question # 16

Spraying of DDT produces pollution of

Question # 17

Atomospheric pollutant is

Question # 18

Ozone hole is maximum over

Question # 19

Burning of fossil fuels is the main source of pollution

Question # 20

The normal amount of overhead ozone is about

Question # 21

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

Question # 22

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

Question # 23

Air pollution is not caused by

Question # 24

In purification of potable water the coagulant used is

Question # 25

The largest item which is recycled is

Question # 26

The pH range of the acid rain is

Question # 27

Ecosystem is a smaller unit of

Question # 28

Oceans cove ______ percent of the surface of the earth

Question # 29

Which is not a method for solid waste management

Question # 30

Drawback DDT as presticide is

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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 Which is not the condition for the formation of smog
A. There must be sufficient NO gas
B. There must be sunlight to help photo chemical reaction to take place
C. Air must be blowing swiftly
D. There must be SO2in the air
3 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
4 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
5 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
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 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
8 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
9 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
10 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable

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