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Important Questions

Water

ICSE · Class 9 · Chemistry

Most important questions from Water for ICSE Class 9 Chemistry board exam 2026. MCQs, short answer, and long answer questions with marks.

43 questions36 flashcards5 concepts

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A diagram illustrating the arrangement and movement of particles in solid, liquid, and gaseous states of matter.
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43 Questions·
multiple choicemultiple correct

Sample Questions

1multiple correct

Which of the following are examples of hydrated substances?

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CuSO4·5H2O (Blue vitriol), Na2CO3·10H2O (Washing soda), MgSO4·7H2O (Epsom salt)

Hydrated substances contain water of crystallization. CuSO4·5H2O, Na2CO3·10H2O, and MgSO4·7H2O all contain water molecules. NaCl and KNO3 are anhydrous substances without water of crystallization.

2multiple correct

Which of the following are characteristics of a true solution?

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It is homogeneous, It is clear and transparent, Solute particles are very small

A true solution is homogeneous, clear, transparent, and contains very small solute particles (about 10⁻¹⁰ m). It does not scatter light and cannot be separated by filtration.

3multiple choice

What is efflorescence?

Show answer

Loss of water of crystallization on exposure to air

Efflorescence is the phenomenon where hydrated substances lose their water of crystallization when exposed to dry air, causing them to crumble into powder. Examples include washing soda and Glauber's salt.

4multiple correct

Hard water contains dissolved salts of:

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Calcium, Magnesium

Hard water contains dissolved salts of calcium and magnesium, such as their bicarbonates, sulfates, or chlorides. Sodium and potassium salts do not cause water hardness.

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Frequently Asked Questions

What are the important topics in Water for ICSE Class 9 Chemistry?
Key topics in Water include Correct Classification of Water Absorption and Loss Phenomena, Chapter Overview: Water — Key Concepts, Chapter Water — Complete Concept Map. These are the concepts ICSE Class 9 examiners draw on most — study them first, then practise related questions.
How to score full marks in Water — ICSE Class 9 Chemistry?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Water?
There are 43 practice questions available for Water. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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