Pollution of Air and Water Quiz - CBSE Class 8 Science

Free practice quiz: Pollution of Air and Water (CBSE Class 8 Science). 13 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which of the following is NOT a major source of air pollution?

   1. Burning fossil fuels
   2. Volcanic eruptions
   3. Planting trees
   4. Industrial emissions
   Show answer

   Answer: C. Planting trees

   Planting trees helps improve air quality, not pollute it. Burning fossil fuels, volcanic eruptions, and industrial emissions are all major sources of air pollution.

2. Explain how acid rain is formed and its impact on the environment

   1. Acid rain forms when sulfur dioxide and nitrogen oxides react with water vapor in the atmosphere, causing environmental damage like damaging forests and aquatic life.
   2. Acid rain forms when carbon dioxide reacts with water vapor in the atmosphere, causing global warming.
   3. Acid rain is formed by the decomposition of dead plants and animals in water bodies.
   4. Acid rain is caused by excessive use of fertilizers
   Show answer

   Answer: A. Acid rain forms when sulfur dioxide and nitrogen oxides react with water vapor in the atmosphere, causing environmental damage like damaging forests and aquatic life.

   Acid rain is formed when pollutants like sulfur dioxide and nitrogen oxides react with water molecules in the atmosphere. This creates sulfuric and nitric acids which fall as rain, damaging ecosystems.

3. Discuss the role of deforestation in air and water pollution.

   1. Deforestation has no significant impact on pollution.
   2. Deforestation reduces air pollution and improves water quality.
   3. Deforestation increases air and water pollution; loss of trees increases erosion and CO2 levels.
   4. Deforestation only affects air pollution.
   Show answer

   Answer: C. Deforestation increases air and water pollution; loss of trees increases erosion and CO2 levels.

   Trees absorb CO2 and help prevent soil erosion. Deforestation increases CO2 levels and leads to increased water pollution through sedimentation.

4. Evaluate the effectiveness of different pollution control measures, such as using catalytic converters or implementing stricter environmental regulations.

   1. Pollution control measures are completely ineffective.
   2. All pollution control measures are equally effective.
   3. Catalytic converters reduce vehicle emissions, while stricter regulations can decrease pollution from various sources.
   4. Pollution control measures only affect air pollution.
   Show answer

   Answer: C. Catalytic converters reduce vehicle emissions, while stricter regulations can decrease pollution from various sources.

   Different methods target different pollution sources; a combination is usually most effective.

5. Propose innovative solutions to address the challenges of air and water pollution in urban areas, considering the economic, social, and environmental implications.

   1. There are no innovative solutions to air and water pollution.
   2. Solutions are solely technological advancements.
   3. Solutions must integrate technological, policy, and community-based approaches, addressing economic, social, and environmental factors.
   4. Solutions should only focus on environmental factors.
   Show answer

   Answer: C. Solutions must integrate technological, policy, and community-based approaches, addressing economic, social, and environmental factors.

   Addressing pollution requires a multi-pronged strategy that involves technological innovation, effective policies, and community engagement to ensure sustainable and equitable solutions.

Browse all Pollution of Air and Water quizzes