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

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 # 2

Potable water is considered to be

Question # 3

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

Question # 4

Ozone hole is maximum over

Question # 5

The largest item which is recycled is

Question # 6

Pollution is

Question # 7

The normal amount of overhead ozone is about

Question # 8

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

Question # 9

Which of the following is not an air

Question # 10

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

Question # 11

A pollutant affects

Question # 12

Carbon monoxide is harmful to human beings as it

Question # 13

Acid rains are produced by

Question # 14

UV radiations bring about

Question # 15

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

Question # 16

Depletion of ozone layer is due to

Question # 17

In incinerating the waste is burnt at

Question # 18

The amount of Si in the lithosphere is about

Question # 19

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

Question # 20

Most hazardous metal pollutant of automobile exhaust is

Question # 21

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 22

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

Question # 23

Pick up the correct statement

Question # 24

Water is often treated with chlorine to

Question # 25

Increased asthmatic attacks in certain seasons are related to

Question # 26

Soil remediation means

Question # 27

Which causes water pollution?

Question # 28

Chloroflurocarbon releases a chemical harmful to ozone

Question # 29

The region of earth capable of supporting life is

Question # 30

As it passes into food chain, the concentration of DDT

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
2 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
3 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
4 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
5 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
6 Soil remediation means
A. To make it suitable for cultivation of crops
B. To make it acidic
C. To make it alkeline
D. To add manure into it
7 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
8 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
9 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
10 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter

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