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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  • Time Allowed30

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ECAT Chemistry Chapter 27 Environmental Chemistry

00:00
Question # 1

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

Question # 2

A single chlorine free radical can destroy how many ozone molecules

Question # 3

Increasing skin cancer and high mutation rate are due to

Question # 4

The normal amount of overhead ozone is about

Question # 5

Swage water is purified by

Question # 6

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

Question # 7

NO and NO2gases in atmosphere are represented by

Question # 8

Chief air pollutant which is likely to deplete ozone layer

Question # 9

In purification of potable water the coagulant used is

Question # 10

Which one is not a pollutant normally?

Question # 11

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

Question # 12

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 13

The film forming components of paints are

Question # 14

Water which his considered to be safe for human consumption is known as

Question # 15

Drawback DDT as presticide is

Question # 16

Ecology is a science of environment and deals specially with

Question # 17

UV radiations bring about

Question # 18

Spraying of DDT produces pollution of

Question # 19

A pollutant affects

Question # 20

B.O.D is connected with

Question # 21

The pH range of the acid rain is

Question # 22

SO2Makes ______ acid rains

Question # 23

Which heavy metals do not have any safe limits

Question # 24

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

Question # 25

Photochemical smog is caused by

Question # 26

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

Question # 27

SO2and NO2produce pollution by increasing

Question # 28

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

Question # 29

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 # 30

Soil salinity can be measured by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
2 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
3 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
4 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
5 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
6 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
7 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
8 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
9 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
10 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically

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