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

Which is not the condition for the formation of smog

Question # 2

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 3

Spraying of DDT produces pollution of

Question # 4

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

Question # 5

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

Question # 6

Ozone hole refers to

Question # 7

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

Question # 8

The largest item which is recycled is

Question # 9

Which heavy metals do not have any safe limits

Question # 10

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

Question # 11

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 # 12

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

Question # 13

Which factor is helping to reduce the environmental pollution

Question # 14

Which step is unnecessary for purification of water for drinking purposes

Question # 15

Domestic waste mostly constitutes

Question # 16

Which one is the major reason for pollution in high cities?

Question # 17

In purification of potable water the coagulant used is

Question # 18

In the atmosphere, CO2is about

Question # 19

B.O.D is connected with

Question # 20

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

Question # 21

Photochemical smog is caused by

Question # 22

Which of the following is not an air

Question # 23

Which causes water pollution?

Question # 24

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

Question # 25

Soil salinity can be measured by

Question # 26

Drained sewage has B.O.D

Question # 27

Chief air pollutant which is likely to deplete ozone layer

Question # 28

The film forming components of paints are

Question # 29

In incinerating the waste is burnt at

Question # 30

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

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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 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
3 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
4 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
5 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
6 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
7 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
8 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
9 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
10 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%

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