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 step is unnecessary for purification of water for drinking purposes

Question # 2

Which one is the most toxic?

Question # 3

Water is often treated with chlorine to

Question # 4

DDT is

Question # 5

In purification of potable water the coagulant used is

Question # 6

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

Question # 7

Which of the following is not an air

Question # 8

Which is not a method for solid waste management

Question # 9

Potable water is considered to be

Question # 10

SO2Makes ______ acid rains

Question # 11

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

Question # 12

BOD is

Question # 13

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 14

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 15

Pollution is

Question # 16

Water pollution is mainly due to

Question # 17

Which one is not a pollutant normally?

Question # 18

Sulphur dioxide affects

Question # 19

A single chlorine free radical can destroy how many ozone molecules

Question # 20

The region of earth capable of supporting life is

Question # 21

Oceans cove ______ percent of the surface of the earth

Question # 22

The amount of oxygen in the lithosphere is about

Question # 23

The normal amount of overhead ozone is about

Question # 24

Chief source of water and soil pollution is

Question # 25

Acid rains are produced by

Question # 26

Which heavy metals do not have any safe limits

Question # 27

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 28

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

Question # 29

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 # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
3 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
4 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
5 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
6 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
7 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
8 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
9 Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
10 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%

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