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

Pollution is

Question # 2

Which is not a component of environment

Question # 3

Ozone hole refers to

Question # 4

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

Question # 5

Domestic waste mostly constitutes

Question # 6

As it passes into food chain, the concentration of DDT

Question # 7

Which factor is helping to reduce the environmental pollution

Question # 8

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

Question # 9

SO2and NO2produce pollution by increasing

Question # 10

Ozone hole is maximum over

Question # 11

Classical smog occurs in palces of

Question # 12

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

Question # 13

Soil salinity can be measured by

Question # 14

Water which his considered to be safe for human consumption is known as

Question # 15

Oceans cove ______ percent of the surface of the earth

Question # 16

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

Question # 17

BOD is

Question # 18

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 19

Atmosphere of big/metropolitan cities is polluted most by

Question # 20

Ecosystem is a smaller unit of

Question # 21

The region of earth capable of supporting life is

Question # 22

NO and NO2gases in atmosphere are represented by

Question # 23

DDT is

Question # 24

Increased asthmatic attacks in certain seasons are related to

Question # 25

Which heavy metals do not have any safe limits

Question # 26

Minamata disease is due to pollution of

Question # 27

Result of ozone hole is

Question # 28

Potable water is considered to be

Question # 29

Which causes water pollution?

Question # 30

Which of the following is not an air

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
2 Carbon monoxide is harmful to human beings as it
A. Is carcinogenic
B. Is antagonistic to CO2
C. Has higher affinity for hemoglobin as compared to oxygen
D. Is destructive to O3
3 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene
4 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
5 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
6 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
7 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
8 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
9 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
10 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only

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