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

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 2

Which step is unnecessary for purification of water for drinking purposes

Question # 3

Domestic waste mostly constitutes

Question # 4

Which gas is not a constituent of atmosphere

Question # 5

Minamata disease is due to pollution of

Question # 6

Environmental pollution affects

Question # 7

Chief source of water and soil pollution is

Question # 8

Sulphur dioxide affects

Question # 9

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 # 10

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

Question # 11

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

Question # 12

A single chlorine free radical can destroy how many ozone molecules

Question # 13

The normal amount of overhead ozone is about

Question # 14

Which of the following human activities are contaminating surface and ground waters

Question # 15

As it passes into food chain, the concentration of DDT

Question # 16

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 # 17

Biodegradable pollutant is

Question # 18

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

Question # 19

Atmosphere of big/metropolitan cities is polluted most by

Question # 20

Which one of the following is not air pollutant gas

Question # 21

Water pollution is mainly due to

Question # 22

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 23

BOD is

Question # 24

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

Question # 25

Pollution is

Question # 26

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

Question # 27

Shahi Qilla may be destroyed by

Question # 28

Increased asthmatic attacks in certain seasons are related to

Question # 29

What is the cause of water pollution

Question # 30

Carbon monoxide is pollutant as it

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
3 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
4 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
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 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
7 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
8 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
9 The largest item which is recycled is
A. Newspaper
B. Plastic
C. Aluminium
D. Oil
10 Minamata disease is due to pollution of
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere

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