Fill in the blank spaces by choosing the correct words from the list given below:
List: atom, analysis, formula, molecule, ferrous sulphide, air, physical, energy, heterogeneous, compound, dissolved
(viii) Tap water is not a pure substance, because, in addition to water, it contains salts and ……………………………. in it.

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Solution

Tap water:
Tap water contains small quantities of dissolved salts and air in addition to water.
Tap water is not a pure form of water and these salts are added to water to give flavour.
Therefore, Tap water is not a pure substance, because, in addition to water, it contains salts and air in it.

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1. Fill in the blank spaces by choosing the correct words from the list given below:
List: atom, analysis, formula, molecule, ferrous sulphide, air, physical, energy, heterogeneous, compound, dissolved

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1. Fill in the blank spaces by choosing the correct words from the list given below:
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Tap water:Tap water contains small quantities of dissolved salts and air in addition to water. Tap water is not a pure form of water and these salts are added to water to give flavour.Therefore, Tap water is not a pure substance, because, in addition to water, it contains salts and air in it.

Tap water:
Tap water contains small quantities of dissolved salts and air in addition to water.
Tap water is not a pure form of water and these salts are added to water to give flavour.
Therefore, Tap water is not a pure substance, because, in addition to water, it contains salts and air in it.