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ICSE Class 9 Chemistry Question 8 of 8

Practical Chemistry — Question 8

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Question 8

State in brief, the preventive steps to control the pollution of water bodies in the locality.

Answer

The following preventive steps can control the pollution of water bodies in the locality —

  1. Collection and disposal of domestic sewage — A typical waste water system for sewage consists of a network of waste water pipes.
    Sewer Lateral Pipes — These waste water pipes collect sewage from household.
    Sewer Main Pipe — It is the larger pipe on the main street which connects from sewer lateral pipe. The waste water from this pipe is then led to the Water treatment plant.
  2. Water treatment plant — In a water treatment plant, the waster water goes through the below stages to remove the pollutants and impurities from it, thereby controlling water pollution:
    1. Screen
    2. Coagulation
    3. Sedimentation
    4. Filtration
    5. Disinfection
Answer

Answer: Collection and disposal of domestic sewage, Water treatment plant

Source: This question is from Practical Chemistry, Chemistry — Class 9, ICSE Board.

Key Concepts Covered

This question tests your understanding of the following concepts from the chapter Practical Chemistry: Question, Preventive, Steps, Control, Pollution, Water. These are fundamental topics in Chemistry that students are expected to master as part of the ICSE Class 9 curriculum.

A thorough understanding of these concepts will help you answer similar questions confidently in your ICSE examinations. These topics are frequently tested in both objective and subjective sections of Chemistry papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.

How to Approach This Question

Read the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.

Key Points to Remember

  • Balance chemical equations before solving numerical problems.
  • Learn the periodic table trends and exceptions.
  • Understand reaction mechanisms, not just outcomes.
  • Use correct IUPAC nomenclature in your answers.

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