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1) Colour of precipitate formed is grey. Precipitate formed is calcium hydroxide. Chemical formula of calcium hydroxide is Ca(OH)2
2) CaO +H2O ---> Ca(OH)2.
Reaction type is Combination reaction.
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(I) the colour of the precipitate is off grey .
it's chemical formula is cao.
(ii) the reaction takes place is combination
reaction.
cao + H2O ----- Ca(OH)2 + heat.
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