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

Exposure to CO results in

Question # 2

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

Question # 3

Ozone hole is maximum over

Question # 4

Pick up the correct statement

Question # 5

Oceans cove ______ percent of the surface of the earth

Question # 6

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 7

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 # 8

Depletion of ozone layer is due to

Question # 9

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

Question # 10

As it passes into food chain, the concentration of DDT

Question # 11

Which gasses are produced from landfills

Question # 12

Increasing skin cancer and high mutation rate are due to

Question # 13

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

Question # 14

Chromium (VI) is highly toxic and can cause

Question # 15

Atomospheric pollutant is

Question # 16

Which one of the following is not air pollutant gas

Question # 17

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

Question # 18

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

Question # 19

Which gas is not a constituent of atmosphere

Question # 20

What is the cause of water pollution

Question # 21

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

Question # 22

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

Question # 23

BOD is

Question # 24

The pH range of the acid rain is

Question # 25

The amount of oxygen in the lithosphere is about

Question # 26

Photochemical smog is caused by

Question # 27

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

Question # 28

Carbon monoxide is pollutant as it

Question # 29

Soil remediation means

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
2 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
3 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
4 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
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 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
7 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
8 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
9 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
10 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

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