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

Drawback DDT as presticide is

Question # 2

The largest item which is recycled is

Question # 3

B.O.D is connected with

Question # 4

In purification of potable water the coagulant used is

Question # 5

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

Question # 6

Fungicides are the pesticides which

Question # 7

Ozone hole is maximum over

Question # 8

Phosphate pollution is caused by

Question # 9

Water is often treated with chlorine to

Question # 10

Which heavy metals do not have any safe limits

Question # 11

Ecology is a science of environment and deals specially with

Question # 12

Carbon monoxide is pollutant as it

Question # 13

Acid rains are produced by

Question # 14

Burning of fossil fuels is the main source of pollution

Question # 15

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 16

Swage water is purified by

Question # 17

Environmental pollution affects

Question # 18

Oceans cove ______ percent of the surface of the earth

Question # 19

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

Question # 20

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

Question # 21

The amount of oxygen in the lithosphere is about

Question # 22

Soil salinity can be measured by

Question # 23

Soil remediation means

Question # 24

Sulphur dioxide affects

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

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

Question # 27

Which is not a component of environment

Question # 28

Air pollution is not caused by

Question # 29

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

Question # 30

Which is not the affect of polluted air on environment

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
3 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
4 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
5 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
6 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
7 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
8 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
9 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
10 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles

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