Chemistry 9th Chap 11 : Topic 5 - Maryam Publications

Chemistry Chapter 11 : Topic 5

Sulfur and Acid Rain

1 / 20

How does sulfur present in fossil fuels contribute to the formation of acid rain?

A) It neutralizes atmospheric moisture.

B) It directly reacts with oxygen to form water vapour.

C) It converts into oxygen gas during combustion.

D) It burns to form sulfur dioxide, which later forms acids in the atmosphere.

2 / 20

Which gas produced during combustion of sulfur-containing fuels is primarily responsible for acid rain?

A) Sulfur dioxide

B) Oxygen

C) Nitrogen gas

D) Carbon monoxide

3 / 20

What is the correct sequence of chemical transformation leading to acid rain formation from sulfur emissions?

A) S → O₂ → CO₂

B) SO₂ → SO₃ → H₂SO₄

C) H₂O → SO₂ → O₃

D) SO₂ → O₂ → H₂O

4 / 20

Why is sulfur dioxide considered an environmental pollutant?

A) It forms sulfuric acid in the atmosphere causing acid rain.

B) It enhances photosynthesis.

C) It reduces atmospheric pressure.

D) It increases oxygen concentration in air.

5 / 20

Which process in the atmosphere converts sulfur dioxide into sulfur trioxide?

A) Neutralization with ammonia

B) Oxidation in presence of oxygen and catalysts

C) Condensation with water vapor

D) Reduction by oxygen

6 / 20

What is the primary acid formed when sulfur dioxide reacts with atmospheric moisture?

A) Hydrochloric acid

B) Nitric acid

C) Sulfuric acid

D) Carbonic acid

7 / 20

Which environmental effect is most directly linked with acid rain caused by sulfur compounds?

A) Reduction in global temperature

B) Corrosion of buildings and monuments

C) Increase in oxygen levels in water bodies

D) Increase in soil fertility

8 / 20

How does acid rain affect aquatic life in lakes and rivers?

A) It neutralizes water bodies completely.

B) It increases oxygen levels in water.

C) It increases fish reproduction.

D) It lowers pH, making water toxic for aquatic organisms.

9 / 20

Which property of sulfur dioxide makes it dangerous for long-range environmental impact?

A) It can travel long distances in the atmosphere.

B) It is insoluble in air.

C) It instantly converts to oxygen.

D) It remains localized near emission sources only.

10 / 20

Which material is most vulnerable to damage from sulfur-based acid rain?

A) Limestone and marble buildings

B) Glass containers

C) Rubber tires

D) Plastic polymers

11 / 20

What happens when sulfur dioxide dissolves in rainwater?

A) It forms alkaline solution.

B) It forms neutral solution.

C) It forms acidic solution.

D) It produces oxygen gas.

12 / 20

Which reaction correctly represents acid rain formation from sulfur dioxide?

A) SO₂+O₂+H₂O → H₂SO₄

B) SO₂+CO₂ → HCl

C) SO₂ → O₂+H₂

D) SO₂+H₂O → NaOH

13 / 20

Why does acid rain damage soil fertility?

A) It increases organic matter content.

B) It leaches essential nutrients from soil.

C) It increases nitrogen fixation.

D) It converts soil into rock.

14 / 20

Which human activity is the major source of sulfur dioxide emissions?

A) Evaporation of water bodies

B) Burning of fossil fuels in power plants

C) Respiration in animals

D) Photosynthesis in plants

15 / 20

How does sulfur contribute indirectly to respiratory problems?

A) By producing nitrogen gas

B) By reducing air pressure

C) By forming acidic gases that irritate respiratory tract

D) By increasing oxygen levels in lungs

16 / 20

Which statement best explains environmental impact of sulfur emissions?

A) They cause long-term acidification of ecosystems.

B) They improve plant growth.

C) They increase atmospheric oxygen.

D) They reduce rainfall completely.

17 / 20

Why are forests affected by acid rain?

A) It increases chlorophyll production.

B) It increases photosynthesis rate.

C) It damages leaves and reduces nutrient uptake from soil.

D) It enhances water absorption in roots.

18 / 20

Which step is essential in transforming sulfur dioxide into acid rain components?

A) Oxidation and hydration of SO₂

B) Evaporation of water vapor

C) Condensation of oxygen

D) Reduction of SO₂ into sulfur

19 / 20

Why is sulfur considered more harmful in fossil fuels compared to inert gases?

A) It cools down atmosphere.

B) It increases oxygen levels.

C) It remains completely unreactive.

D) It forms acidic pollutants after combustion.

20 / 20

What is the long-term environmental consequence of continuous sulfur dioxide emissions?

A) Restoration of ecosystems

B) Acidification of soil and water bodies

C) Increase in biodiversity

D) Stabilization of climate

Your score is

0%