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

SO2and NO2produce pollution by increasing

Question # 2

Carbon monoxide is pollutant as it

Question # 3

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

Question # 4

Which of the following is not an air

Question # 5

In the atmosphere, CO2is about

Question # 6

Spraying of DDT produces pollution of

Question # 7

Which is not the condition for the formation of smog

Question # 8

B.O.D is connected with

Question # 9

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 # 10

The pH range of the acid rain is

Question # 11

Potable water is considered to be

Question # 12

Chloroflurocarbon releases a chemical harmful to ozone

Question # 13

Acid rains are produced by

Question # 14

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

Question # 15

BOD is

Question # 16

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

Question # 17

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

Question # 18

Chief source of water and soil pollution is

Question # 19

Classical smog occurs in palces of

Question # 20

Ecology is a science of environment and deals specially with

Question # 21

Increasing skin cancer and high mutation rate are due to

Question # 22

Increased asthmatic attacks in certain seasons are related to

Question # 23

Environmental pollution affects

Question # 24

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 25

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

Question # 26

Pick up the correct statement

Question # 27

Soil remediation means

Question # 28

The largest item which is recycled is

Question # 29

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

Question # 30

NO and NO2gases in atmosphere are represented by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
2 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
3 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
4 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
5 What is the cause of water pollution
A. Chemical and bacterial contents in live stock
B. The spilled oil in rivers and ponds
C. Wide spread use of pesticides
D. All of the above
6 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
7 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
8 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
9 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
10 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems

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