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

Classical smog occurs in palces of

Question # 2

Which is not a component of environment

Question # 3

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

Question # 4

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 5

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

Question # 6

Phosphate pollution is caused by

Question # 7

Shahi Qilla may be destroyed by

Question # 8

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

Question # 9

BOD is

Question # 10

SO2and NO2produce pollution by increasing

Question # 11

Acid rain is due to increase in atmospheric concentration of

Question # 12

B.O.D is connected with

Question # 13

Oceans cove ______ percent of the surface of the earth

Question # 14

UV radiations bring about

Question # 15

Which is not the condition for the formation of smog

Question # 16

Swage water is purified by

Question # 17

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 18

Ultraviolet radiation from sun causes a reaction that produces

Question # 19

Ecosystem is a smaller unit of

Question # 20

A single chlorine free radical can destroy how many ozone molecules

Question # 21

Which gas is not a constituent of atmosphere

Question # 22

Environmental pollution affects

Question # 23

As it passes into food chain, the concentration of DDT

Question # 24

In purification of potable water the coagulant used is

Question # 25

Chloroflurocarbon releases a chemical harmful to ozone

Question # 26

What is the cause of water pollution

Question # 27

Drained sewage has B.O.D

Question # 28

Polycyolic aromatic hydrocarbons are taught to be

Question # 29

The pH range of the acid rain is

Question # 30

The amount of oxygen in the lithosphere is about

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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 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
3 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water
4 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
5 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
6 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
7 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above
8 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
9 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
10 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these

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