(I) Combination Reaction
(II) Decomposition Reaction
(III) Exothermic Reaction
(IV) Endothermic Reaction
(a) Only (I)
(b) Only (II)
(c) Both (I) and (III)
(d) Both (II) and (IV)
Ans: (c) Both (I) and (III)
Explanation: The reaction between calcium
oxide and water is a combination reaction as
the two compounds combine to form a single
product slaked lime, Ca(OH)2 and the equation
of the reaction taking place is:
CaO(s) + H2O(l) Ca(OH)2(aq) + Heat
It is also an exothermic reaction as a large
amount of heat is released during this reaction.
