Which of the following compound is obtained when quicklime reacts with water?

{Ca(NO}_{3})_{2}

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{Ca(HCO}_{3})_{2}

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{Ca(OH)}_{2}

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{CaCO}_{3}

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Solution

The correct option is C ${Ca(OH)}_{2}$
Slaked lime $({Ca(OH)}_{2})$ is formed when quicklime $(CaO)$ reacts with water. The equation of the reaction is given below:
$CaO(s) + H_{2} O(l) \to {Ca(OH)}_{2} (aq) + Heat$

This is an example of a combination reaction because there is only one product that is being formed from the reaction between the two reactants.

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