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

Fungicides are the pesticides which

Question # 2

Chromium (VI) is highly toxic and can cause

Question # 3

Increasing skin cancer and high mutation rate are due to

Question # 4

Burning of fossil fuels is the main source of pollution

Question # 5

Which one is not a pollutant normally?

Question # 6

B.O.D is connected with

Question # 7

SO2and NO2produce pollution by increasing

Question # 8

Ozone hole is maximum over

Question # 9

Which is not a component of environment

Question # 10

Ecology is a science of environment and deals specially with

Question # 11

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

Question # 12

Pollution is

Question # 13

As it passes into food chain, the concentration of DDT

Question # 14

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

Question # 15

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

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 the affect of polluted air on environment

Question # 18

Shahi Qilla may be destroyed by

Question # 19

DDT is

Question # 20

Biodegradable pollutant is

Question # 21

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

Question # 22

Minamata disease is due to pollution of

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

Carbon monoxide is pollutant as it

Question # 25

The largest item which is recycled is

Question # 26

Drawback DDT as presticide is

Question # 27

BOD is

Question # 28

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 29

Pick up the correct statement

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
4 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
5 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
6 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
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 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
9 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
10 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2

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