Match the following columns. Column I (Occurrence of Water) Column II (Examples) (i) Hydrated salt (a) Mist and fog (ii) Solid state (b) CuSO 4 . 5 H 2 O (iii) Liquid state (c) Ice, frost (iv) Gaseous state (d) Well water, sea water

(i)-(b) A hydrated salt is a crystalline salt molecule that is loosely attached to a certain number of water molecules. Copper(II) sulphate pentahydrate is an example of such a hydrated salt. (ii)-(c) Ice is the solid state of water, a normally liquid substance that freezes to the solid state at temperatures of 0 ∘ C or lower and expands to the gaseous state at temperatures of 100 ° C or higher. (iii)-(d) Matter in the liquid state maintains a fixed volume, but has a variable shape that adapts to fit its container. Water mostly found in liquid, gas and solid state. Water present in well and Sea is in liquid state. (iv)-(a) Fog or mist shows up when water vapour, or water in its gaseous form, condenses. During condensation, molecules of water vapour combine to make tiny liquid water droplets that hang in the air. Mist or fog is particularly abundant in Earth's atmosphere and acts as the most potent greenhouse gas, stronger than other gases such as carbon dioxide and methane.

E M B I B E

All In One ICSE Chemistry>Chapter 3 - Water>EXAM PRACTICE>Q 13

EASY

9th ICSE

IMPORTANT

Earn 100

Hot aluminium oxide ( ${Al}_{2} O_{3}$ ) is a

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Important Questions on Water

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 3 - Water>EXAM PRACTICE>Q 15

${CaSO}_{4} + {Na}_{2} {CO}_{3} \underset{}{\to} X + Y$

What is the X and Y is the above reaction ?

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 3 - Water>EXAM PRACTICE>Q 16

Match the following columns.

Column I (Occurrence of Water)	Column II (Examples)
(i) Hydrated salt	(a) Mist and fog
(ii) Solid state	(b) ${CuSO}_{4} . 5 H_{2} O$
(iii) Liquid state	(c) Ice, frost
(iv) Gaseous state	(d) Well water, sea water