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

Atmosphere of big/metropolitan cities is polluted most by

Question # 2

Sulphur dioxide affects

Question # 3

Acid rain is due to increase in atmospheric concentration of

Question # 4

Which is not a component of environment

Question # 5

Ozone hole refers to

Question # 6

Which one of the following is not air pollutant gas

Question # 7

Which gasses are produced from landfills

Question # 8

In the atmosphere, O2is about

Question # 9

Phosphate pollution is caused by

Question # 10

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

Question # 11

Burning of fossil fuels is the main source of pollution

Question # 12

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

Question # 13

Which factor is helping to reduce the environmental pollution

Question # 14

Which of the following human activities are contaminating surface and ground waters

Question # 15

A single chlorine free radical can destroy how many ozone molecules

Question # 16

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

Question # 17

Swage water is purified by

Question # 18

The amount of Si in the lithosphere is about

Question # 19

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

Question # 20

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

Question # 21

A pollutant affects

Question # 22

Drained sewage has B.O.D

Question # 23

Chromium (VI) is highly toxic and can cause

Question # 24

B.O.D is connected with

Question # 25

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

Question # 26

Ecosystem is a smaller unit of

Question # 27

The normal amount of overhead ozone is about

Question # 28

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

Question # 29

Soil remediation means

Question # 30

As it passes into food chain, the concentration of DDT

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Sr.# Question Answer
1 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water
2 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
3 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
4 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
5 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
6 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
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 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
9 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
10 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
11 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
12 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
13 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
14 Ozone hole is maximum over
A. Europe
B. Antarctica
C. Asia
D. Africa
15 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
16 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
17 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
18 Soil remediation means
A. To make it suitable for cultivation of crops
B. To make it acidic
C. To make it alkeline
D. To add manure into it
19 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above
20 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
21 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
22 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
23 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
24 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
25 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
26 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
27 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
28 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
29 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
30 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2

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