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

Domestic waste mostly constitutes

Question # 2

The largest item which is recycled is

Question # 3

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

Question # 4

Spraying of DDT produces pollution of

Question # 5

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 # 6

Soil salinity can be measured by

Question # 7

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

Question # 8

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

Question # 9

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 10

What is the cause of water pollution

Question # 11

NO and NO2gases in atmosphere are represented by

Question # 12

Which gas is not a constituent of atmosphere

Question # 13

Which one is the most toxic?

Question # 14

Acid rains are produced by

Question # 15

Chromium (VI) is highly toxic and can cause

Question # 16

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

Question # 17

Which one is not a pollutant normally?

Question # 18

Oceans cove ______ percent of the surface of the earth

Question # 19

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 # 20

Swage water is purified by

Question # 21

Drawback DDT as presticide is

Question # 22

Biodegradable pollutant is

Question # 23

A single chlorine free radical can destroy how many ozone molecules

Question # 24

Which one is the major reason for pollution in high cities?

Question # 25

Result of ozone hole is

Question # 26

Eutrophication causes reduction in

Question # 27

The % of CO2is the atmosphere is

Question # 28

Which is not the affect of polluted air on environment

Question # 29

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
2 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
3 The film forming components of paints are
A. Resins
B. Thinners
C. Pigments
D. Driers
4 Pollution is
A. Removal of top soill
B. Release of toxic/undesirable materials in enevironment
C. Conversation of energy
D. All the above
5 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
6 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
A. Iodine
B. Bromine
C. Lead
D. Carbon
7 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
8 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
9 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
10 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum

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