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

A single chlorine free radical can destroy how many ozone molecules

Question # 2

NO and NO2gases in atmosphere are represented by

Question # 3

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 4

In the atmosphere, O2is about

Question # 5

Phosphate pollution is caused by

Question # 6

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 7

Potable water is considered to be

Question # 8

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

Question # 9

Minamata disease is due to pollution of

Question # 10

Drawback DDT as presticide is

Question # 11

Carbon monoxide is pollutant as it

Question # 12

Chromium (VI) is highly toxic and can cause

Question # 13

In Antarctica ozone depletion is due to the formation of following compound

Question # 14

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 # 15

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 # 16

Most hazardous metal pollutant of automobile exhaust is

Question # 17

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

Question # 18

Oceans cove ______ percent of the surface of the earth

Question # 19

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

Question # 20

Pollution is

Question # 21

Exposure to CO results in

Question # 22

Air pollution is not caused by

Question # 23

Pick up the correct statement

Question # 24

Atomospheric pollutant is

Question # 25

Spraying of DDT produces pollution of

Question # 26

Which of the following waste material is not recycled for use again

Question # 27

Water which his considered to be safe for human consumption is known as

Question # 28

Which is not a method for solid waste management

Question # 29

Shahi Qilla may be destroyed by

Question # 30

BOD is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
3 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
4 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
5 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
6 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
7 Sulphur dioxide affects
A. Cell wall
B. Plasmodesmata
C. All membrane systems
D. Nucleus
8 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
9 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
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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