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

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

Question # 2

Chief air pollutant which is likely to deplete ozone layer

Question # 3

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

Question # 4

Carbon monoxide is pollutant as it

Question # 5

Polycyolic aromatic hydrocarbons are taught to be

Question # 6

BOD is

Question # 7

Ultraviolet radiation from sun causes a reaction that produces

Question # 8

Minamata disease is due to pollution of

Question # 9

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 # 10

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

Question # 11

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

Question # 12

Result of ozone hole is

Question # 13

Soil remediation means

Question # 14

A pollutant affects

Question # 15

Exposure to CO results in

Question # 16

In the atmosphere, O2is about

Question # 17

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

Question # 18

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 19

Chief source of water and soil pollution is

Question # 20

B.O.D is connected with

Question # 21

Which one is not a pollutant normally?

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

Phosphate pollution is caused by

Question # 26

Ozone hole refers to

Question # 27

The amount of Si in the lithosphere is about

Question # 28

Which of the following is not an air

Question # 29

A single chlorine free radical can destroy how many ozone molecules

Question # 30

Increased asthmatic attacks in certain seasons are related to

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which is not the condition for the formation of smog
A. There must be sufficient NO gas
B. There must be sunlight to help photo chemical reaction to take place
C. Air must be blowing swiftly
D. There must be SO2in the air
2 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
3 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
4 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
5 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
6 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
7 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
8 Ozone hole is maximum over
A. Europe
B. Antarctica
C. Asia
D. Africa
9 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
10 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO

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