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11th Chemistry Monthly Test - 2 ( Environmental Chemistry )

MABS Institution

11th Chemistry Monthly Test - 2 ( Environmental Chemistry )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Statement I : Global warming is due to Green house effect.
Statement II : Green house gas is CH₄

Both statement I and statement II are true and statement II explains statement I
Both statement I and statement II are true but statement II does not explain statement I
Statement I is true but statement II is false
Both statement I and II are false

Which of the following pair of oxides is responsible for acid rain?

SO₃ +NO₂
CO₂ + CO
N₂O + CH₄
O₂ + H₂

Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be

highly polluted
poor in dissolved oxygen
rich in dissolved oxygen
low COD

Which among the following is a green house gas?

H₂
CH₄
O₃
All of these

Which of the following is not a greenhouse gas?

CO
O₃
CH₄
Water vapours

Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using __________

grit chamber
scrubbers
trickling filters
catalytic convertors

Which of the following is natural and human disturbance in ecology?

Forest fire
Floods
Acid rain
Green house effect

Which causes water pollution?

Jet planes
Herbicides
Smoke
Combustion of fossils

Which one of the following gases is not present in troposphere?

N₂O₂
CO₂
N₂
water vapours

Living in the atmosphere of CO is dangerous because it

Combines with O₂ present inside to form CO₂
Reduces organic matter of tissues
Combines with haemoglobin and makes it incapable to absorb oxygen
Dries up the blood

Part - B

Generic 2 - Answer All Question

What is the tolerable limit of fluoride ions in drinking water? What happens if it exceeds 10 ppm?

Explain how industrial waste affects the soil.

Write a short note on global warming.

(i)· Name three natural sources of air pollution
(ii) What compound will be formed when CO combines with blood?

How will you control photochemical smog?

What are the types of air pollutants? Give examples.

What are total dissolved solids (TDS)?

Part - C

Generic 3 - Answer All Question

Explain how oxides of nitrogen are introduced directly into the stratosphere?

What is photochemical smog? What are its effects? How can it be controlled?

Explain the harmful effects of
(i) lead
(ii) Nitrate in drinking water.

Explain how hydrocarbons pollute the atmospheric air.

How chemical wastes pollute water?

Explain how the oxides of sulphur pollute the atmospheric air. Give its harmful effects

On the basis of chemical reactions involved, explain how do CFC’s cause depletion of ozone layer in stratosphere?

Part - D

Generic 5 - Answer All Question

Differentiate the following
(i) BOD and COD
(ii) Viable and non-viable particulate pollutants

What are the health effects of particulate pollutants?

What is environmental pollution? How is it caused?

Discuss in detail about the gaseous air pollutants.

Describe about the causes of water pollution
Ethane burns completely in air to give CO₂, while in a limited supply of air gives CO. The same gases are found in automobile exhaust. Both CO and CO₂ are atmospheric pollutants
i) What is the danger associated with these gases
ii) How do the pollutants affect the human body?

Write on essay about soil pollution especially stating about the sources of pollution.

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