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

Phosphate pollution is caused by

Question # 2

Biodegradable pollutant is

Question # 3

A single chlorine free radical can destroy how many ozone molecules

Question # 4

In incinerating the waste is burnt at

Question # 5

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 # 6

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

Question # 7

In purification of potable water the coagulant used is

Question # 8

B.O.D is connected with

Question # 9

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 10

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 11

Increasing skin cancer and high mutation rate are due to

Question # 12

Polycyolic aromatic hydrocarbons are taught to be

Question # 13

Most hazardous metal pollutant of automobile exhaust is

Question # 14

In the atmosphere, O2is about

Question # 15

Fungicides are the pesticides which

Question # 16

Which of the following is not an air

Question # 17

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

Question # 18

Which is not a component of environment

Question # 19

Result of ozone hole is

Question # 20

Which one is not a pollutant normally?

Question # 21

Which heavy metals do not have any safe limits

Question # 22

Water pollution is mainly due to

Question # 23

Which is not the condition for the formation of smog

Question # 24

Photochemical smog is caused by

Question # 25

Atomospheric pollutant is

Question # 26

Chief source of water and soil pollution is

Question # 27

Soil salinity can be measured by

Question # 28

Which factor is helping to reduce the environmental pollution

Question # 29

Drained sewage has B.O.D

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
2 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
3 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
4 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
5 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
6 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
7 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
8 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
9 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
10 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
s

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