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

Shahi Qilla may be destroyed by

Question # 2

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 # 3

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

Question # 4

DDT is

Question # 5

Water is often treated with chlorine to

Question # 6

Biodegradable pollutant is

Question # 7

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

Question # 8

In the atmosphere, O2is about

Question # 9

The normal amount of overhead ozone is about

Question # 10

Which of the following is not an air

Question # 11

Depletion of ozone layer is due to

Question # 12

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

Question # 13

Which one is the most toxic?

Question # 14

What is the cause of water pollution

Question # 15

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

Question # 16

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

Question # 17

Most hazardous metal pollutant of automobile exhaust is

Question # 18

The pH range of the acid rain is

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

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 # 21

Which is not a component of environment

Question # 22

Ozone hole is maximum over

Question # 23

Acid rains are produced by

Question # 24

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 25

Water pollution is mainly due to

Question # 26

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 27

Drawback DDT as presticide is

Question # 28

Increased asthmatic attacks in certain seasons are related to

Question # 29

BOD is

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
2 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter
3 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
4 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
5 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
6 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
7 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
8 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
9 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
10 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these

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