Question

Lime water + sulphuric acid $\to$
(A) Heat + calcium sulphate
(B) water+ heat
(C) Calcium sulphate + water + heat
(D) None of the above

Answer 1

Acid base reaction is called neutralization reaction. It is an exothermic reaction. The neutralization of acid with base results in formation of corresponding salt and water. Dissociation of strong base and strong acid is very high.

Complete step by step answer:
Lime water is the common name for dilute aqueous solution of calcium hydroxide. Calcium hydroxide is sparsely soluble at room temperature in water. It is a strong base. Pure lime water is clear and colorless, with a slight earthy smell and an astringent/bitter taste. Drinking lime water improves digestion.
Sulphuric acid , also known as oil of vitriol, is a mineral acid. It is a strong oxidizing agent and a strong acid. It is a colorless, odourless and viscous liquid that is soluble in water.
Sulphuric acid is a strong acid and lime water is a strong base,they undergo complete dissociation in solution. The product has salt Calcium sulphate and water. Since it is a reaction with strong acid and a strong base, more heat is released during the reaction.
Hence the correct answer is the C option.

Note: An acid-base reaction is a type of chemical reaction that involves the exchange or one or more hydrogen ions. In the reaction, base neutralizes the acid to the formation of salt and water.This reaction is neutralization reaction and it is an exothermic reaction.