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

SO2Makes ______ acid rains

Question # 2

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

Question # 3

Sulphur dioxide affects

Question # 4

Ecology is a science of environment and deals specially with

Question # 5

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

Question # 6

Water is often treated with chlorine to

Question # 7

Acid rain is due to increase in atmospheric concentration of

Question # 8

Chromium (VI) is highly toxic and can cause

Question # 9

Domestic waste mostly constitutes

Question # 10

Drained sewage has B.O.D

Question # 11

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 # 12

Which is not a method for solid waste management

Question # 13

Carbon monoxide is pollutant as it

Question # 14

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 # 15

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

Question # 16

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 # 17

Polycyolic aromatic hydrocarbons are taught to be

Question # 18

A single chlorine free radical can destroy how many ozone molecules

Question # 19

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

Question # 20

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

Question # 21

Which of the following is not an air

Question # 22

Swage water is purified by

Question # 23

Which is not the affect of polluted air on environment

Question # 24

B.O.D is connected with

Question # 25

Chief source of water and soil pollution is

Question # 26

Ozone depletion in stratosphere shall result in

Question # 27

In purification of potable water the coagulant used is

Question # 28

In the atmosphere, CO2is about

Question # 29

Which gas is not a constituent of atmosphere

Question # 30

SO2and NO2produce pollution by increasing

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
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 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
4 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
5 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
6 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
7 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
8 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
9 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
10 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these

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