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

Ozone hole is maximum over

Question # 2

The normal amount of overhead ozone is about

Question # 3

The amount of oxygen in the lithosphere is about

Question # 4

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 5

Exposure to CO results in

Question # 6

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

Question # 7

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 # 8

In the atmosphere, O2is about

Question # 9

A pollutant affects

Question # 10

Shahi Qilla may be destroyed by

Question # 11

Carbon monoxide is pollutant as it

Question # 12

Increased asthmatic attacks in certain seasons are related to

Question # 13

BOD is

Question # 14

The film forming components of paints are

Question # 15

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 16

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

Question # 17

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 18

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

Question # 19

Which factor is helping to reduce the environmental pollution

Question # 20

Chromium (VI) is highly toxic and can cause

Question # 21

The amount of Si in the lithosphere is about

Question # 22

The region of earth capable of supporting life is

Question # 23

UV radiations bring about

Question # 24

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

Question # 25

Carbon monoxide is harmful to human beings as it

Question # 26

Sulphur dioxide affects

Question # 27

The largest item which is recycled is

Question # 28

Increasing skin cancer and high mutation rate are due to

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
2 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
3 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
4 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
5 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
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 one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
8 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
9 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter
10 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

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