Bright Tutorials Bright Tutorials
ICSE Class 9 Chemistry Question 7 of 8

Practical Chemistry — Question 7

Back to all questions
7
Question

Question 7

State the meaning of the term 'water pollution'. State how would you find out the different sources of pollution of water bodies in the locality.

Answer

Water pollution is an undesirable change in the chemical, physical and biological conditions of water due to the presence of foreign substances in water.
It leads to degradation in the quality of water and makes it unsuitable for it's designated use.

The main sources of pollution of water bodies in the locality are:

  1. Household Detergents — Household chemical cleaning organic compounds used for laundering and dish washing contain phosphates, mainly sodium triphosphate. Phosphates are a major source of water pollution.
  2. Domestic Sewage — It is the waste water generated from household activities. Domestic sewage water contains organic materials from food and vegetables and inorganic materials like phosphates and nitrates from soaps and detergents.
Answer

Answer: Household Detergents, Domestic Sewage

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, Term, Water, Pollution, Out, Sources. 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.

Related Questions from Practical Chemistry

Practice more questions from Practical Chemistry — Chemistry, Class 9 ICSE