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 is not the condition for the formation of smog

Question # 2

DDT is

Question # 3

Ecosystem is a smaller unit of

Question # 4

SO2Makes ______ acid rains

Question # 5

Shahi Qilla may be destroyed by

Question # 6

The largest item which is recycled is

Question # 7

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

Question # 8

Which is not a component of environment

Question # 9

Photochemical smog is caused by

Question # 10

Acid rains are produced by

Question # 11

Ultraviolet radiation from sun causes a reaction that produces

Question # 12

Polycyolic aromatic hydrocarbons are taught to be

Question # 13

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 14

Biodegradable pollutant is

Question # 15

Drawback DDT as presticide is

Question # 16

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

Question # 17

Increasing skin cancer and high mutation rate are due to

Question # 18

The % of CO2is the atmosphere is

Question # 19

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

Question # 20

Which step is unnecessary for purification of water for drinking purposes

Question # 21

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

Question # 22

Carbon monoxide is harmful to human beings as it

Question # 23

BOD is

Question # 24

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

Question # 25

As it passes into food chain, the concentration of DDT

Question # 26

Spraying of DDT produces pollution of

Question # 27

Atomospheric pollutant is

Question # 28

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 # 29

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

Question # 30

Chief air pollutant which is likely to deplete ozone layer

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
3 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
4 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
5 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
6 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
7 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
8 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
9 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
10 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

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