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

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Question # 1

B.O.D is connected with

Question # 2

Increasing skin cancer and high mutation rate are due to

Question # 3

The pH range of the acid rain is

Question # 4

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

Question # 5

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

Question # 6

Which one is not a pollutant normally?

Question # 7

In the atmosphere, O2is about

Question # 8

Ecology is a science of environment and deals specially with

Question # 9

Eutrophication causes reduction in

Question # 10

Shahi Qilla may be destroyed by

Question # 11

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 12

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

Question # 13

Chief air pollutant which is likely to deplete ozone layer

Question # 14

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

Question # 15

Depletion of ozone layer is due to

Question # 16

Drawback DDT as presticide is

Question # 17

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

Question # 18

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 # 19

Which is not a component of environment

Question # 20

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 21

Chloroflurocarbon releases a chemical harmful to ozone

Question # 22

Chief source of water and soil pollution is

Question # 23

Which causes water pollution?

Question # 24

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 25

Spraying of DDT produces pollution of

Question # 26

Polycyolic aromatic hydrocarbons are taught to be

Question # 27

UV radiations bring about

Question # 28

In incinerating the waste is burnt at

Question # 29

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

Question # 30

Pick up the correct statement

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
3 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
4 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
5 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment
6 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
7 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
8 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
9 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
10 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

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