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

Carbon monoxide is harmful to human beings as it

Question # 2

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 # 3

A pollutant affects

Question # 4

Domestic waste mostly constitutes

Question # 5

Increased asthmatic attacks in certain seasons are related to

Question # 6

Pick up the correct statement

Question # 7

In incinerating the waste is burnt at

Question # 8

Acid rain is due to increase in atmospheric concentration of

Question # 9

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

Question # 10

Exposure to CO results in

Question # 11

Depletion of ozone layer is due to

Question # 12

A single chlorine free radical can destroy how many ozone molecules

Question # 13

Chromium (VI) is highly toxic and can cause

Question # 14

Which factor is helping to reduce the environmental pollution

Question # 15

Ecosystem is a smaller unit of

Question # 16

Pollution is

Question # 17

Environmental pollution affects

Question # 18

In the atmosphere, CO2is about

Question # 19

Minamata disease is due to pollution of

Question # 20

SO2Makes ______ acid rains

Question # 21

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 22

Ozone hole is maximum over

Question # 23

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

Question # 24

Increasing skin cancer and high mutation rate are due to

Question # 25

Cyclone collector is used for minimizing

Question # 26

Which step is unnecessary for purification of water for drinking purposes

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

The largest item which is recycled is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which is not the condition for the formation of smog
A. There must be sufficient NO gas
B. There must be sunlight to help photo chemical reaction to take place
C. Air must be blowing swiftly
D. There must be SO2in the air
2 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth
3 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
4 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
5 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
6 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
7 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
8 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
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 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%

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