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Write down the formulae of
(i) sodium oxide

(ii) aluminium chloride

(iii) sodium sulphide

(iv) magnesium hydroxide


Answer :

The formulae are:

(i) sodium oxide \(\rightarrow \) Na\( _2 \)O

(ii) aluminium chloride \(\rightarrow \) AlCl\( _3 \)

(iii) sodium sulphide \(\rightarrow \) Na\( _2 \)S

(iv) magnesium hydroxide \(\rightarrow \)Mg (OH)\( _2 \)

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