Water Exe-3C Very Short Answer Chemistry Class-9 ICSE Selina Publishers

Water Exe-3C Very Short Answer Chemistry Class-9 ICSE Selina Publishers Solutions Chapter-3. Step By Step ICSE Selina Concise Solutions of Chapter-3 Water with All Exercise including MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type, Numerical and Structured/Application Questions Solved . Visit official Website CISCE for detail information about ICSE Board Class-9.

Water Exe-3C Very Short Answer Chemistry Class-9 ICSE Concise Selina Publishers

Board	ICSE
Publications	Selina Publication
Subject	Chemistry
Class	9th
Chapter-3	Water
Book Name	Concise
Topics	Solution of (Soft and hard Water) Exercise – 3C Very Short Answer
Academic Session	2023-2024

Exercise – 3C Very Short Answer

Water Class-9 Chemistry Concise Solutions  

Page-55

Question 1.

Name:

(a) The solute and solvent in sugar solution.

(b) The characteristic property which makes water the universal solvent.

(c) A substance whose solubility shows an anomalous behaviour.

(d) A substance whose solubility rapidly increases with the temperature.

Answer:

(a) Sugar is solute, water is solvent

(b) Water is a polar covalent compound having a dielectric constant which makes it a universal solvent.

(c) Solubility of Glauber’s salt [Na₂SO₄.10H₂O] shows anomalous behaviour.

(d) Potassium nitrate

Question 2.

What is the composition of water? In what volume its elements combine?

Answer:

The composition of water is 2 atoms of hydrogen with 1 atom of oxygen (H₂O).

By number of atoms, they combine in the ratio 2:1.

Question 3.

Name the substances which give water:

(a) temporary hardness

(b) permanent hardness

Answer:

(i) Hydrogen carbonates of calcium and magnesium make water temporary hard.

(ii) Sulphates and chlorides of magnesium and calcium make water permanently hard.

Question 4.

Name three methods [CM1] by which hydrous substances can be made anhydrous.

Answer:

Hydrous substances can be made anhydrous by:

1. Direct heating
2. Heating in dry or hot air
3. By using dehydrating/desiccating agents such as warm concentrated sulphuric acid.

—  : End of Water Exe-3C Very Short Answer Class-9 ICSE Chemistry Solutions :–

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