Q. 14.3( 13 Votes )

Calcium oxide reacts vigorously with water to produce:
A. Calcium hydroxide releasing a large amount of heat.

B. Calcium hydroxide absorbing a large amount of heat.

C. Calcium oxide and hydrogen with a release of large amount of heat.

D. Calcium oxide any hydrogen with a absorption of large amount of heat.

Answer :

When calcium oxide- CaO is added to water, it reacts vigorously with water to produce slaked lime (calcium hydroxide) and releases a large amount of heat.


The reaction that takes place is:


CaO + H2O Ca(OH)2


Quick lime Slaked lime

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