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 one of the following is not air pollutant gas

Question # 2

Oceans cove ______ percent of the surface of the earth

Question # 3

The % of CO2is the atmosphere is

Question # 4

A single chlorine free radical can destroy how many ozone molecules

Question # 5

UV radiations bring about

Question # 6

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

Question # 7

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

Question # 8

Increasing skin cancer and high mutation rate are due to

Question # 9

A pollutant affects

Question # 10

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

Question # 11

Which gasses are produced from landfills

Question # 12

Minamata disease is due to pollution of

Question # 13

Drained sewage has B.O.D

Question # 14

Which step is unnecessary for purification of water for drinking purposes

Question # 15

Potable water is considered to be

Question # 16

Ozone depletion in stratosphere shall result in

Question # 17

Classical smog occurs in palces of

Question # 18

Ozone hole refers to

Question # 19

The amount of Si in the lithosphere is about

Question # 20

The amount of oxygen in the lithosphere is about

Question # 21

Chloroflurocarbon releases a chemical harmful to ozone

Question # 22

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 # 23

Which of the following is not an air

Question # 24

Increased asthmatic attacks in certain seasons are related to

Question # 25

DDT is

Question # 26

Carbon monoxide is harmful to human beings as it

Question # 27

Ecosystem is a smaller unit of

Question # 28

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 29

Polycyolic aromatic hydrocarbons are taught to be

Question # 30

Which one is not a pollutant normally?

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
2 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
3 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
4 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
5 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
6 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
7 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
8 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
9 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
10 The film forming components of paints are
A. Resins
B. Thinners
C. Pigments
D. Driers

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