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

Which factor is helping to reduce the environmental pollution

Question # 2

Which one is the most toxic?

Question # 3

Chromium (VI) is highly toxic and can cause

Question # 4

Ultraviolet radiation from sun causes a reaction that produces

Question # 5

The normal amount of overhead ozone is about

Question # 6

Which step is unnecessary for purification of water for drinking purposes

Question # 7

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 8

Chloroflurocarbon releases a chemical harmful to ozone

Question # 9

Soil salinity can be measured by

Question # 10

The % of CO2is the atmosphere is

Question # 11

Depletion of ozone layer is due to

Question # 12

Increasing skin cancer and high mutation rate are due to

Question # 13

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

Question # 14

NO and NO2gases in atmosphere are represented by

Question # 15

Exposure to CO results in

Question # 16

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

Question # 17

Air pollution is not caused by

Question # 18

Pollution is

Question # 19

In purification of potable water the coagulant used is

Question # 20

Which heavy metals do not have any safe limits

Question # 21

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

Question # 22

Ecology is a science of environment and deals specially with

Question # 23

Acid rain is due to increase in atmospheric concentration of

Question # 24

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

Question # 25

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

Question # 26

Which is not a component of environment

Question # 27

Environmental pollution affects

Question # 28

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
2 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these
3 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
4 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
5 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
6 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
7 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
8 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
9 Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due
A. Combining with oxygen to form carbon dioxide
B. Destruction of hemoglobin
C. Preventing reaction between oxygen and hemoglobin
D. Forming stable compound with hemoglobin
10 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these

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