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

Domestic waste mostly constitutes

Question # 2

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

Question # 3

Atomospheric pollutant is

Question # 4

In incinerating the waste is burnt at

Question # 5

Potable water is considered to be

Question # 6

Increased asthmatic attacks in certain seasons are related to

Question # 7

The largest item which is recycled is

Question # 8

Photochemical smog is caused by

Question # 9

Which step is unnecessary for purification of water for drinking purposes

Question # 10

SO2Makes ______ acid rains

Question # 11

Ozone hole is maximum over

Question # 12

Phosphate pollution is caused by

Question # 13

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

Question # 14

Chromium (VI) is highly toxic and can cause

Question # 15

The pH range of the acid rain is

Question # 16

Most hazardous metal pollutant of automobile exhaust is

Question # 17

Burning of fossil fuels is the main source of pollution

Question # 18

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 19

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 20

Ecosystem is a smaller unit of

Question # 21

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

Question # 22

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

Question # 23

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

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

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 # 26

Acid rain is due to increase in atmospheric concentration of

Question # 27

NO and NO2gases in atmosphere are represented by

Question # 28

Sulphur dioxide affects

Question # 29

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth
2 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
3 What is the cause of water pollution
A. Chemical and bacterial contents in live stock
B. The spilled oil in rivers and ponds
C. Wide spread use of pesticides
D. All of the above
4 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
5 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
6 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
7 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
8 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
9 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
10 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2

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