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

The amount of Si in the lithosphere is about

Question # 2

What is the cause of water pollution

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

Acid rains are produced by

Question # 5

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

Question # 6

Which one is the most toxic?

Question # 7

The film forming components of paints are

Question # 8

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 # 9

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

Question # 10

Sulphur dioxide affects

Question # 11

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

Question # 12

Which heavy metals do not have any safe limits

Question # 13

Atmosphere of big/metropolitan cities is polluted most by

Question # 14

SO2and NO2produce pollution by increasing

Question # 15

Chromium (VI) is highly toxic and can cause

Question # 16

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

Question # 17

The region of earth capable of supporting life is

Question # 18

Spraying of DDT produces pollution of

Question # 19

BOD is

Question # 20

As it passes into food chain, the concentration of DDT

Question # 21

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

Question # 22

Classical smog occurs in palces of

Question # 23

Which one of the following is not air pollutant gas

Question # 24

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 # 25

Chromium (VI) is highly toxic and can cause

Question # 26

NO and NO2gases in atmosphere are represented by

Question # 27

Drained sewage has B.O.D

Question # 28

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

Question # 29

Photochemical smog is caused by

Question # 30

In the atmosphere, CO2is about

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
3 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
4 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
5 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
6 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+
7 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter
8 Sulphur dioxide affects
A. Cell wall
B. Plasmodesmata
C. All membrane systems
D. Nucleus
9 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
10 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration

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