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 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 # 2

Which one of the following is not air pollutant gas

Question # 3

Chromium (VI) is highly toxic and can cause

Question # 4

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

Question # 5

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

Question # 6

Mottling of teeth is due to presence of an element in drinking water

Question # 7

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

Question # 8

The region of earth capable of supporting life is

Question # 9

Which of the following human activities are contaminating surface and ground waters

Question # 10

Acid rains are produced by

Question # 11

The amount of oxygen in the lithosphere is about

Question # 12

The normal amount of overhead ozone is about

Question # 13

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

Question # 14

Soil remediation means

Question # 15

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 16

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 # 17

Acid rain is due to increase in atmospheric concentration of

Question # 18

Chromium (VI) is highly toxic and can cause

Question # 19

The % of CO2is the atmosphere is

Question # 20

SO2Makes ______ acid rains

Question # 21

Ozone depletion in stratosphere shall result in

Question # 22

Which is not the condition for the formation of smog

Question # 23

Ozone hole is maximum over

Question # 24

Water is often treated with chlorine to

Question # 25

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

Question # 26

Polycyolic aromatic hydrocarbons are taught to be

Question # 27

In purification of potable water the coagulant used is

Question # 28

Drained sewage has B.O.D

Question # 29

Eutrophication causes reduction in

Question # 30

Pick up the correct statement

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
2 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
3 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
4 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
5 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
6 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
A. Iodine
B. Bromine
C. Lead
D. Carbon
7 The largest item which is recycled is
A. Newspaper
B. Plastic
C. Aluminium
D. Oil
8 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
9 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
10 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these

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