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

Increasing skin cancer and high mutation rate are due to

Question # 2

Cyclone collector is used for minimizing

Question # 3

A pollutant affects

Question # 4

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 5

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 # 6

Drained sewage has B.O.D

Question # 7

Swage water is purified by

Question # 8

Domestic waste mostly constitutes

Question # 9

The region of earth capable of supporting life is

Question # 10

In incinerating the waste is burnt at

Question # 11

Drawback DDT as presticide is

Question # 12

Which one of the following is not air pollutant gas

Question # 13

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

Question # 14

The normal amount of overhead ozone is about

Question # 15

Ozone hole refers to

Question # 16

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

Question # 17

Pollution is

Question # 18

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

Question # 19

As it passes into food chain, the concentration of DDT

Question # 20

The amount of Si in the lithosphere is about

Question # 21

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

Question # 22

Ozone depletion in stratosphere shall result in

Question # 23

Which gas is not a constituent of atmosphere

Question # 24

Ecology is a science of environment and deals specially with

Question # 25

Which is not the affect of polluted air on environment

Question # 26

Fungicides are the pesticides which

Question # 27

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

Question # 28

BOD is

Question # 29

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 # 30

A single chlorine free radical can destroy how many ozone molecules

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
2 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
3 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
4 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
5 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
6 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
7 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
8 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
9 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
10 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above

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