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 one is the most toxic?

Question # 2

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

Question # 3

Which gas is not a constituent of atmosphere

Question # 4

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 5

Ecosystem is a smaller unit of

Question # 6

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

Question # 7

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 8

UV radiations bring about

Question # 9

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

Question # 10

Which factor is helping to reduce the environmental pollution

Question # 11

Domestic waste mostly constitutes

Question # 12

Which one is the major reason for pollution in high cities?

Question # 13

Classical smog occurs in palces of

Question # 14

Ozone hole is maximum over

Question # 15

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

Question # 16

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

Question # 17

Which gasses are produced from landfills

Question # 18

Potable water is considered to be

Question # 19

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 # 20

Phosphate pollution is caused by

Question # 21

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

Question # 22

Soil salinity can be measured by

Question # 23

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

Question # 24

The region of earth capable of supporting life is

Question # 25

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

Question # 26

Which step is unnecessary for purification of water for drinking purposes

Question # 27

Which causes water pollution?

Question # 28

Which is not a component of environment

Question # 29

In incinerating the waste is burnt at

Question # 30

Chloroflurocarbon releases a chemical harmful to ozone

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water
3 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
4 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
5 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
6 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
7 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
8 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth
9 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
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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