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

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

Question # 2

Ozone depletion in stratosphere shall result in

Question # 3

SO2and NO2produce pollution by increasing

Question # 4

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

Question # 5

Which is not the affect of polluted air on environment

Question # 6

Atmosphere of big/metropolitan cities is polluted most by

Question # 7

Ecosystem is a smaller unit of

Question # 8

In the atmosphere, CO2is about

Question # 9

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

Question # 10

Which of the following is not an air

Question # 11

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

Question # 12

The pH range of the acid rain is

Question # 13

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

Question # 14

Increased asthmatic attacks in certain seasons are related to

Question # 15

NO and NO2gases in atmosphere are represented by

Question # 16

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

Question # 17

Result of ozone hole is

Question # 18

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

Question # 19

Phosphate pollution is caused by

Question # 20

Which of the following waste material is not recycled for use again

Question # 21

Carbon monoxide is harmful to human beings as it

Question # 22

Classical smog occurs in palces of

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

Which heavy metals do not have any safe limits

Question # 27

Pollution is

Question # 28

Chromium (VI) is highly toxic and can cause

Question # 29

In incinerating the waste is burnt at

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
2 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
3 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
4 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
5 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
6 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
7 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
8 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
9 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
10 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

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