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

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

Question # 2

A single chlorine free radical can destroy how many ozone molecules

Question # 3

Which is not a component of environment

Question # 4

Water pollution is mainly due to

Question # 5

Polycyolic aromatic hydrocarbons are taught to be

Question # 6

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

Question # 7

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 # 8

Which gasses are produced from landfills

Question # 9

In incinerating the waste is burnt at

Question # 10

Ultraviolet radiation from sun causes a reaction that produces

Question # 11

BOD is

Question # 12

The amount of oxygen in the lithosphere is about

Question # 13

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 # 14

Fungicides are the pesticides which

Question # 15

Pollution is

Question # 16

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 # 17

Eutrophication causes reduction in

Question # 18

The region of earth capable of supporting life is

Question # 19

Chromium (VI) is highly toxic and can cause

Question # 20

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 21

Atmosphere of big/metropolitan cities is polluted most by

Question # 22

Increasing skin cancer and high mutation rate are due to

Question # 23

Chief source of water and soil pollution is

Question # 24

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

Question # 25

Which of the following is not an air

Question # 26

Carbon monoxide is harmful to human beings as it

Question # 27

Shahi Qilla may be destroyed by

Question # 28

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

Question # 29

Swage water is purified by

Question # 30

Result of ozone hole is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
2 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
3 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
4 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
5 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
6 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
7 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
8 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
9 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
10 Pollution is
A. Removal of top soill
B. Release of toxic/undesirable materials in enevironment
C. Conversation of energy
D. All the above

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