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

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

Question # 2

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

Question # 3

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

Question # 4

Ecology is a science of environment and deals specially with

Question # 5

In the atmosphere, CO2is about

Question # 6

Which factor is helping to reduce the environmental pollution

Question # 7

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

Question # 8

Cyclone collector is used for minimizing

Question # 9

UV radiations bring about

Question # 10

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 11

Atomospheric pollutant is

Question # 12

Which one of the following is not air pollutant gas

Question # 13

The normal amount of overhead ozone is about

Question # 14

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

Question # 15

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 # 16

Ozone hole is maximum over

Question # 17

In purification of potable water the coagulant used is

Question # 18

Which is not the condition for the formation of smog

Question # 19

Water is often treated with chlorine to

Question # 20

Which step is unnecessary for purification of water for drinking purposes

Question # 21

Biodegradable pollutant is

Question # 22

The amount of Si in the lithosphere is about

Question # 23

B.O.D is connected with

Question # 24

Carbon monoxide is pollutant as it

Question # 25

Minamata disease is due to pollution of

Question # 26

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 # 27

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

Question # 28

Chief source of water and soil pollution is

Question # 29

Atmosphere of big/metropolitan cities is polluted most by

Question # 30

Acid rains are produced by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
2 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
3 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
4 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
5 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
6 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
7 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
8 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
9 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
10 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie

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