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

Water is often treated with chlorine to

Question # 2

Acid rains are produced by

Question # 3

Classical smog occurs in palces of

Question # 4

Which factor is helping to reduce the environmental pollution

Question # 5

Ecology is a science of environment and deals specially with

Question # 6

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

Question # 7

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

Question # 8

What is the cause of water pollution

Question # 9

SO2Makes ______ acid rains

Question # 10

Carbon monoxide is harmful to human beings as it

Question # 11

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 12

Which is not a component of environment

Question # 13

Increased asthmatic attacks in certain seasons are related to

Question # 14

Which causes water pollution?

Question # 15

Most hazardous metal pollutant of automobile exhaust is

Question # 16

Pick up the correct statement

Question # 17

Drawback DDT as presticide is

Question # 18

Ultraviolet radiation from sun causes a reaction that produces

Question # 19

Spraying of DDT produces pollution of

Question # 20

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 # 21

Phosphate pollution is caused by

Question # 22

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

Question # 23

Ecosystem is a smaller unit of

Question # 24

BOD is

Question # 25

B.O.D is connected with

Question # 26

SO2and NO2produce pollution by increasing

Question # 27

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 # 28

Sulphur dioxide affects

Question # 29

Chief source of water and soil pollution is

Question # 30

Chloroflurocarbon releases a chemical harmful to ozone

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ECAT Chapter 27 Important MCQ's

Sr.# Question Answer
1 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
2 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
3 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
4 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
5 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
6 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
7 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
8 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
9 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
10 Which is not a method for solid waste management
A. Landfill
B. Incinerating
C. Recycling
D. None of these

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