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

Result of ozone hole is

Question # 2

Shahi Qilla may be destroyed by

Question # 3

Sulphur dioxide affects

Question # 4

The % of CO2is the atmosphere is

Question # 5

Which one is the most toxic?

Question # 6

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

Question # 7

DDT is

Question # 8

Pick up the correct statement

Question # 9

Which heavy metals do not have any safe limits

Question # 10

Which step is unnecessary for purification of water for drinking purposes

Question # 11

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

Question # 12

Burning of fossil fuels is the main source of pollution

Question # 13

Which is not a method for solid waste management

Question # 14

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 # 15

In purification of potable water the coagulant used is

Question # 16

Polycyolic aromatic hydrocarbons are taught to be

Question # 17

Which one is not a pollutant normally?

Question # 18

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

Question # 19

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 # 20

Oceans cove ______ percent of the surface of the earth

Question # 21

Classical smog occurs in palces of

Question # 22

Soil remediation means

Question # 23

In the atmosphere, CO2is about

Question # 24

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

Question # 25

Soil salinity can be measured by

Question # 26

Drawback DDT as presticide is

Question # 27

Eutrophication causes reduction in

Question # 28

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

Question # 29

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

Question # 30

Ecosystem is a smaller unit of

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
2 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
3 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
4 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
5 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
6 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
7 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
8 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
9 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
10 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil

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