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

A single chlorine free radical can destroy how many ozone molecules

Question # 2

Soil remediation means

Question # 3

Which one of the following is not air pollutant gas

Question # 4

In Antarctica ozone depletion is due to the formation of following compound

Question # 5

Ecosystem is a smaller unit of

Question # 6

Ecology is a science of environment and deals specially with

Question # 7

Which causes water pollution?

Question # 8

Burning of fossil fuels is the main source of pollution

Question # 9

In purification of potable water the coagulant used is

Question # 10

Which gasses are produced from landfills

Question # 11

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

Question # 12

Chromium (VI) is highly toxic and can cause

Question # 13

The amount of oxygen in the lithosphere is about

Question # 14

What is the cause of water pollution

Question # 15

BOD is

Question # 16

Oceans cove ______ percent of the surface of the earth

Question # 17

Ozone hole is maximum over

Question # 18

Which heavy metals do not have any safe limits

Question # 19

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 20

Ultraviolet radiation from sun causes a reaction that produces

Question # 21

Ozone depletion in stratosphere shall result in

Question # 22

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

Question # 23

In incinerating the waste is burnt at

Question # 24

Ozone hole refers to

Question # 25

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

Question # 26

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

Question # 27

Biodegradable pollutant is

Question # 28

Soil salinity can be measured by

Question # 29

Which is not the condition for the formation of smog

Question # 30

Water is often treated with chlorine to

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
2 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
3 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
4 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
5 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
6 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
7 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
8 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
9 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
10 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%

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