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

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

Question # 2

Result of ozone hole is

Question # 3

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 4

Chromium (VI) is highly toxic and can cause

Question # 5

Spraying of DDT produces pollution of

Question # 6

The amount of Si in the lithosphere is about

Question # 7

Acid rain is due to increase in atmospheric concentration of

Question # 8

Ozone hole is maximum over

Question # 9

Pollution is

Question # 10

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 11

Polycyolic aromatic hydrocarbons are taught to be

Question # 12

Chief air pollutant which is likely to deplete ozone layer

Question # 13

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 14

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 15

Shahi Qilla may be destroyed by

Question # 16

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

Question # 17

Which is not a method for solid waste management

Question # 18

Ecosystem is a smaller unit of

Question # 19

Cyclone collector is used for minimizing

Question # 20

Swage water is purified by

Question # 21

Water is often treated with chlorine to

Question # 22

Which gas is not a constituent of atmosphere

Question # 23

Increased asthmatic attacks in certain seasons are related to

Question # 24

In the atmosphere, CO2is about

Question # 25

Which heavy metals do not have any safe limits

Question # 26

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 # 27

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 # 28

Eutrophication causes reduction in

Question # 29

Which is not a component of environment

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
2 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
3 Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due
A. Combining with oxygen to form carbon dioxide
B. Destruction of hemoglobin
C. Preventing reaction between oxygen and hemoglobin
D. Forming stable compound with hemoglobin
4 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
5 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
6 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
7 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
8 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
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 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury

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