"To pour water on calcium oxide." Which is another way to classify the reaction ? Explain.

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Solution

When water is added to calcium oxide (quicklime), it will be converted to calcium hydroxide (slaked lime) with the liberation of enormous amount of heat.

$C a O + H_{2} O \to C a (O H)_{2} + h e a t$

It is an exothermic reaction.
Calcium hydroxide is an alkali.

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