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 of the following human activities are contaminating surface and ground waters

Question # 2

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

Question # 3

In purification of potable water the coagulant used is

Question # 4

Phosphate pollution is caused by

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

The film forming components of paints are

Question # 7

What is the cause of water pollution

Question # 8

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

Question # 9

Minamata disease is due to pollution of

Question # 10

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

Question # 11

Water pollution is mainly due to

Question # 12

Chromium (VI) is highly toxic and can cause

Question # 13

Acid rain is due to increase in atmospheric concentration of

Question # 14

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

Question # 15

Which gas is not a constituent of atmosphere

Question # 16

Soil salinity can be measured by

Question # 17

Chromium (VI) is highly toxic and can cause

Question # 18

Spraying of DDT produces pollution of

Question # 19

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

Question # 20

Swage water is purified by

Question # 21

The normal amount of overhead ozone is about

Question # 22

Ozone hole refers to

Question # 23

Carbon monoxide is pollutant as it

Question # 24

Drawback DDT as presticide is

Question # 25

Increased asthmatic attacks in certain seasons are related to

Question # 26

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 27

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

Question # 28

Which one of the following is not air pollutant gas

Question # 29

Potable water is considered to be

Question # 30

Result of ozone hole is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
2 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
3 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
4 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
5 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
6 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
7 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
8 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
A. Iodine
B. Bromine
C. Lead
D. Carbon
9 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
10 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out

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