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Answer -
(i) When Na metal is droppedin water, it reacts violently to form sodium hydroxide and hydrogen gas. Thechemical equation involved in the reaction is:
(ii) On being heated inair, sodium reacts vigorously with oxygen to form sodium peroxide. The chemicalequation involved in the reaction is:
(iii) When sodium peroxideis dissolved in water, it is readily hydrolysed to form sodium hydroxide andwater. The chemical equation involved in the reaction is: