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

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Question # 1

Carbon monoxide is harmful to human beings as it

Question # 2

B.O.D is connected with

Question # 3

Which one of the following is not air pollutant gas

Question # 4

Chief air pollutant which is likely to deplete ozone layer

Question # 5

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

Question # 6

DDT is

Question # 7

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 # 8

Chromium (VI) is highly toxic and can cause

Question # 9

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

Question # 10

Biodegradable pollutant is

Question # 11

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

Question # 12

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 # 13

Photochemical smog is caused by

Question # 14

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

Question # 15

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 16

Depletion of ozone layer is due to

Question # 17

Chromium (VI) is highly toxic and can cause

Question # 18

In the atmosphere, CO2is about

Question # 19

Ozone depletion in stratosphere shall result in

Question # 20

Which causes water pollution?

Question # 21

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

Question # 22

Atmosphere of big/metropolitan cities is polluted most by

Question # 23

In purification of potable water the coagulant used is

Question # 24

Which is not the affect of polluted air on environment

Question # 25

Polycyolic aromatic hydrocarbons are taught to be

Question # 26

Result of ozone hole is

Question # 27

The amount of oxygen in the lithosphere is about

Question # 28

Minamata disease is due to pollution of

Question # 29

Atomospheric pollutant is

Question # 30

As it passes into food chain, the concentration of DDT

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
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 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
4 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
5 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene
6 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
7 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
8 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
9 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
10 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%

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