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

Acid rain is due to increase in atmospheric concentration of

Question # 2

Burning of fossil fuels is the main source of pollution

Question # 3

A single chlorine free radical can destroy how many ozone molecules

Question # 4

The normal amount of overhead ozone is about

Question # 5

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

Question # 6

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 # 7

BOD is

Question # 8

Drawback DDT as presticide is

Question # 9

Carbon monoxide is pollutant as it

Question # 10

In the atmosphere, O2is about

Question # 11

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

Question # 12

Drained sewage has B.O.D

Question # 13

The amount of oxygen in the lithosphere is about

Question # 14

Atomospheric pollutant is

Question # 15

What is the cause of water pollution

Question # 16

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 17

Depletion of ozone layer is due to

Question # 18

Soil remediation means

Question # 19

Which one is not a pollutant normally?

Question # 20

Ozone hole refers to

Question # 21

Sulphur dioxide affects

Question # 22

The pH range of the acid rain is

Question # 23

DDT is

Question # 24

Environmental pollution affects

Question # 25

Chloroflurocarbon releases a chemical harmful to ozone

Question # 26

Oceans cove ______ percent of the surface of the earth

Question # 27

Soil salinity can be measured by

Question # 28

Polycyolic aromatic hydrocarbons are taught to be

Question # 29

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

Question # 30

Acid rains are produced by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
2 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
3 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
4 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
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 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene
7 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
8 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
9 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
10 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these

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