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

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 2

Which of the following waste material is not recycled for use again

Question # 3

Fungicides are the pesticides which

Question # 4

BOD is

Question # 5

The amount of Si in the lithosphere is about

Question # 6

Ozone hole refers to

Question # 7

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

Question # 8

Increasing skin cancer and high mutation rate are due to

Question # 9

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

Question # 10

In the atmosphere, CO2is about

Question # 11

Which is not a method for solid waste management

Question # 12

Chief air pollutant which is likely to deplete ozone layer

Question # 13

Which one is not a pollutant normally?

Question # 14

Atomospheric pollutant is

Question # 15

Classical smog occurs in palces of

Question # 16

A single chlorine free radical can destroy how many ozone molecules

Question # 17

Chromium (VI) is highly toxic and can cause

Question # 18

NO and NO2gases in atmosphere are represented by

Question # 19

Biodegradable pollutant is

Question # 20

SO2and NO2produce pollution by increasing

Question # 21

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

Question # 22

Depletion of ozone layer is due to

Question # 23

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

Question # 24

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 25

Water is often treated with chlorine to

Question # 26

Pick up the correct statement

Question # 27

The region of earth capable of supporting life is

Question # 28

DDT is

Question # 29

Which step is unnecessary for purification of water for drinking purposes

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
2 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
3 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
4 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
5 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
6 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
7 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
8 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
9 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
10 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

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