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

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

Question # 2

In the atmosphere, O2is about

Question # 3

Carbon monoxide is harmful to human beings as it

Question # 4

A pollutant affects

Question # 5

Which heavy metals do not have any safe limits

Question # 6

Burning of fossil fuels is the main source of pollution

Question # 7

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 8

Chief source of water and soil pollution is

Question # 9

Which factor is helping to reduce the environmental pollution

Question # 10

Which of the following human activities are contaminating surface and ground waters

Question # 11

Carbon monoxide is pollutant as it

Question # 12

A single chlorine free radical can destroy how many ozone molecules

Question # 13

Soil salinity can be measured by

Question # 14

SO2and NO2produce pollution by increasing

Question # 15

The region of earth capable of supporting life is

Question # 16

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 # 17

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

Question # 18

The film forming components of paints are

Question # 19

Chromium (VI) is highly toxic and can cause

Question # 20

In purification of potable water the coagulant used is

Question # 21

Pollution is

Question # 22

Acid rain is due to increase in atmospheric concentration of

Question # 23

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 24

B.O.D is connected with

Question # 25

Drawback DDT as presticide is

Question # 26

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 27

Domestic waste mostly constitutes

Question # 28

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 29

Shahi Qilla may be destroyed by

Question # 30

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
2 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
3 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
4 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
5 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
6 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
7 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
8 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
9 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
10 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water

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