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

Which heavy metals do not have any safe limits

Question # 2

Depletion of ozone layer is due to

Question # 3

Ozone hole is maximum over

Question # 4

In incinerating the waste is burnt at

Question # 5

The region of earth capable of supporting life is

Question # 6

Which one of the following is not air pollutant gas

Question # 7

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

Question # 8

The % of CO2is the atmosphere is

Question # 9

Which is not the condition for the formation of smog

Question # 10

DDT is

Question # 11

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 12

Drawback DDT as presticide is

Question # 13

Ecology is a science of environment and deals specially with

Question # 14

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 # 15

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 16

Acid rain is due to increase in atmospheric concentration of

Question # 17

Chromium (VI) is highly toxic and can cause

Question # 18

Which gas is not a constituent of atmosphere

Question # 19

Biodegradable pollutant is

Question # 20

Soil salinity can be measured by

Question # 21

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

Question # 22

Ultraviolet radiation from sun causes a reaction that produces

Question # 23

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

Question # 24

Which step is unnecessary for purification of water for drinking purposes

Question # 25

Drained sewage has B.O.D

Question # 26

Soil remediation means

Question # 27

Pick up the correct statement

Question # 28

Potable water is considered to be

Question # 29

Ozone hole refers to

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
2 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
3 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
4 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
5 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
6 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
7 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
8 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
9 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
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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