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

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 # 2

Water pollution is mainly due to

Question # 3

Swage water is purified by

Question # 4

DDT is

Question # 5

Classical smog occurs in palces of

Question # 6

Drained sewage has B.O.D

Question # 7

Ecology is a science of environment and deals specially with

Question # 8

Burning of fossil fuels is the main source of pollution

Question # 9

Which is not the condition for the formation of smog

Question # 10

As it passes into food chain, the concentration of DDT

Question # 11

The pH range of the acid rain is

Question # 12

The largest item which is recycled is

Question # 13

Soil salinity can be measured by

Question # 14

In purification of potable water the coagulant used is

Question # 15

Sulphur dioxide affects

Question # 16

Which factor is helping to reduce the environmental pollution

Question # 17

Ecosystem is a smaller unit of

Question # 18

The % of CO2is the atmosphere is

Question # 19

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

Question # 20

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

Question # 21

Chromium (VI) is highly toxic and can cause

Question # 22

A single chlorine free radical can destroy how many ozone molecules

Question # 23

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

Question # 24

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

Question # 25

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 26

Cyclone collector is used for minimizing

Question # 27

The amount of oxygen in the lithosphere is about

Question # 28

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

Question # 29

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 30

Atmosphere of big/metropolitan cities is polluted most by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Which is not the affect of polluted air on environment
A. Acid rain
B. Smog
C. Ozone
D. Global warming
3 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
4 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
5 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
6 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
7 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
8 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
9 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
10 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine

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