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

00:00
Question # 1

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

Question # 2

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

Question # 3

DDT is

Question # 4

Ultraviolet radiation from sun causes a reaction that produces

Question # 5

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

Question # 6

Pollution is

Question # 7

Chromium (VI) is highly toxic and can cause

Question # 8

Depletion of ozone layer is due to

Question # 9

Ecosystem is a smaller unit of

Question # 10

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 11

Which one of the following is not air pollutant gas

Question # 12

Chloroflurocarbon releases a chemical harmful to ozone

Question # 13

As it passes into food chain, the concentration of DDT

Question # 14

In purification of potable water the coagulant used is

Question # 15

Burning of fossil fuels is the main source of pollution

Question # 16

Classical smog occurs in palces of

Question # 17

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

Question # 18

Which gas is not a constituent of atmosphere

Question # 19

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 # 20

Acid rain is due to increase in atmospheric concentration of

Question # 21

The amount of Si in the lithosphere is about

Question # 22

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

Question # 23

The largest item which is recycled is

Question # 24

Chromium (VI) is highly toxic and can cause

Question # 25

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

Question # 26

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

Question # 27

Which is not a component of environment

Question # 28

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

Question # 29

Minamata disease is due to pollution of

Question # 30

Potable water is considered to be

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due
A. Combining with oxygen to form carbon dioxide
B. Destruction of hemoglobin
C. Preventing reaction between oxygen and hemoglobin
D. Forming stable compound with hemoglobin
2 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
3 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
4 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
5 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
6 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
7 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
8 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
9 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
10 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere

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