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Water — Flashcards

ICSE · Class 8 · Chemistry

40 flashcards for Water (ICSE Class 8 Chemistry) to test yourself on key terms and facts. Sample: "What is the chemical formula and chemical"

60 questions40 flashcards2 formulas & key relations5 concepts

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40 Flashcards·
Water as a compoundComposition of waterDiscovery of water as a compoundChemical property of waterPhysical properties of waterUniversal solventSolutions
Card 1Water as a compound

What is the chemical formula and chemical name of water?

Answer

Water has the molecular formula H₂O. Its chemical name is Dihydrogen oxide. It is a compound made of hydrogen and oxygen.

Card 2Composition of water

What is the ratio of hydrogen and oxygen in water by mass and by volume?

Answer

The ratio of hydrogen and oxygen in water is 1 : 8 by mass and 2 : 1 by volume.

Card 3Discovery of water as a compound

Who established that water is a compound of hydrogen and oxygen?

Answer

Henry Cavendish established in 1781 that water is a compound made up of hydrogen and oxygen. Antoine Lavoisier later supported this finding.

Card 4Chemical property of water

What happens when pure water is tested with litmus?

Answer

Pure water is neutral to litmus. It does not change the colour of red or blue litmus.

Card 5Physical properties of water

What is the boiling point and freezing point of pure water at normal pressure?

Answer

Pure water freezes at 0°C and boils at 100°C at normal pressure. The melting point of ice is also 0°C.

Card 6Universal solvent

Why is water called a universal solvent?

Answer

Water is called a universal solvent because it dissolves almost all kinds of solids, liquids, and gases. It dissolves many substances, though not in the same amount.

Card 7Solutions

Define a solution.

Answer

A solution is a homogeneous mixture of two or more substances whose composition can be varied. Solution = solute + solvent Solute = substance dissolved, smaller quantity Solvent = medium of dissoluti…

Card 8Solutions

What is a solute and what is a solvent?

Answer

A solute is a substance that dissolves in other substances and is present in smaller quantity. A solvent is the medium in which the solute dissolves and is present in larger quantity.

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Frequently Asked Questions

What are the important topics in Water for ICSE Class 8 Chemistry?
Key topics in Water include Water as a Compound and Its Occurrence, Physical Properties of Water, Water Cycle and Importance of Water, Water as a Universal Solvent and Types of Mixtures. Study these first, then practise questions on each for Class 8 exams.
How many flashcards are available for Water?
There are 40 flashcards for Water covering key definitions, facts and ideas. A few sample cards are shown on this page.
How should I revise Water for Class 8 exams?
Learn the core ideas first, then work through the 60 practice questions on Water. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

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

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