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

Minamata disease is due to pollution of

Question # 2

Chromium (VI) is highly toxic and can cause

Question # 3

Which one is the most toxic?

Question # 4

Acid rains are produced by

Question # 5

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

Question # 6

Atomospheric pollutant is

Question # 7

Which one is the major reason for pollution in high cities?

Question # 8

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 9

Chief source of water and soil pollution is

Question # 10

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 11

Which one is not a pollutant normally?

Question # 12

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 # 13

Which is not the condition for the formation of smog

Question # 14

Oceans cove ______ percent of the surface of the earth

Question # 15

Water pollution is mainly due to

Question # 16

As it passes into food chain, the concentration of DDT

Question # 17

Which gasses are produced from landfills

Question # 18

In the atmosphere, CO2is about

Question # 19

Shahi Qilla may be destroyed by

Question # 20

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

Question # 21

In purification of potable water the coagulant used is

Question # 22

NO and NO2gases in atmosphere are represented by

Question # 23

The % of CO2is the atmosphere is

Question # 24

The normal amount of overhead ozone is about

Question # 25

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

Question # 26

Exposure to CO results in

Question # 27

The region of earth capable of supporting life is

Question # 28

The largest item which is recycled is

Question # 29

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

Question # 30

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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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 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter
3 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
4 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
5 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
A. Iodine
B. Bromine
C. Lead
D. Carbon
6 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
7 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
8 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
9 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
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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