A) \[CaO\]
B) \[CaC{{O}_{3}}\]
C) \[CaS{{O}_{4}}\]
D) \[CaC{{l}_{2}}\]
Correct Answer: A
Solution :
On adding water, \[CaO\] gives a hissing sound and forms calcium hydroxide (Slaked lime). The reaction is known as slaking of lime. \[CaO+{{H}_{2}}OCa{{(OH)}_{2}}+15000\,cal.\]
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