Question

Solid calcium oxide reacts vigorously with water to form calcium hydroxide
accompanies by liberation of heat. This process is called staking of time. Calicium
hydroxide dissolves in water to form its solution called time water, which among
the following is (are) true about staking of time and the solution formed
(I) It is an exothermic reaction
(ii) The pH of the resulting solution will be more than seven
(iii) The pH of the resulting solution will be less than seven
(iv) It is an endothermic reaction.​

Answer 1

Answer:  -  B

Slaking of lime is an exothermic reaction because a large amount heat is produced during the reaction. The heat can be felt by touching the beaker from outside. The resulting compound Ca(OH)2, which is also called slaked lime, turns red litmus solution to blue and hence proves it to be a basic solution. Thus, the pH of this solution will be more than seven.