Class 6 Science - ICSE-CHEMISTRY
Water
The chapter 'Water' in Class 6 ICSE Chemistry explores water as a universal solvent, its physical properties, and its vital importance to life on Earth. Students will learn about water scarcity, the water cycle, methods of purification like filtration, sedimentation, and distillation, and how to test for the presence of water. This chapter is fundamental for ICSE Chemistry board exams as it lays the groundwork for solutions, solubility, and environmental chemistry in higher classes, typically contributing around 5-8 marks in the final examinations through direct definitions, short-answer questions, and diagram-based queries.
Start Learning FreeKey Concepts
Universal Solvent
Water is called a universal solvent because it can dissolve a large number of substances, both solids and liquids, more than any other liquid.
Solute, Solvent, and Solution
A solute is the substance that dissolves (like salt), a solvent is the liquid doing the dissolving (like water), and the resulting mixture is called a solution.
Sedimentation and Decantation
Sedimentation is the settling down of heavy, insoluble impurities at the bottom of a liquid, and decantation is the careful pouring out of the clear liquid above without disturbing the sediment.
Potable Water
Water that is clean, safe for drinking, and free from harmful germs and toxic chemicals is known as potable water.
Water Cycle
The continuous movement of water on, above, and below the surface of the Earth through evaporation, condensation, and precipitation.
Important Formulas
Board Exam Info
In ICSE Chemistry Class 6, this chapter typically carries 5 to 8 marks. Common question types include defining terms like 'potable water' or 'universal solvent', differentiating between sedimentation and filtration, drawing or labeling the water cycle, and explaining water purification methods.
Frequently Asked Questions
Why is water called a universal solvent?
Water is called a universal solvent because it dissolves more substances than any other liquid, including many solids, liquids, and gases.
What is the difference between filtration and distillation?
Filtration removes only insoluble solid impurities using a filter, whereas distillation removes both insoluble and soluble impurities (including salts) by boiling and condensing water.
Is rain water pure water?
No, rain water is not 100% pure because as it falls through the atmosphere, it dissolves gases like carbon dioxide and sulfur dioxide, along with dust particles present in the air.
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