| (i) The beaker becomes hot because it is an endothermic reaction. |
| (ii) A clear solution is obtained at the top after the reaction gets over. |
| (iii) This reaction is a combination reaction in which quick lime \[(CaO)\] is converted into slaked lime, \[Ca{{(OH)}_{2}}.\] |
A) (i), (ii) and (iii)
B) (ii) and (iii) only
C) (iii) only
D) (i) and (iii) only
Correct Answer: B
Solution :
\[\underset{(Quick\,lime)}{\mathop{Ca{{O}_{(s)}}}}\,+\underset{Water}{\mathop{{{H}_{2}}{{O}_{(l)}}}}\,\xrightarrow{{}}\underset{Slaked\,\lim e}{\mathop{Ca{{(OH)}_{2(aq)}}}}\,\] Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of heat so, it is an exothermic reaction. It is a combination reaction and a clear solution is obtained at the top after the reaction gets over.
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