Calcium oxide reacts vigorously with water to produce slaked lime.
CaO( s)+H2O(l)→Ca(OH)2(aq)
This reaction can be classified as :
(A) Combination reaction
(B) Exothermic reaction
(C) Endothermic reaction
(D) Oxidation reaction
Which of the following is a correct option ?
(a) (A) and (C)
(b) (C) and (D)
(c) (A), (C) and(D)
(d) (A) and (B)
OR
When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphide is obtained and the sulphuric acid so formed remains in the solution. The reaction is an example of a :
(a) Combination reaction
(b) Displacement reaction
(c) Decomposition reaction
(d) Double displacement reaction