Question

$H_{2}S{O}_4$ is not used for preparation of $C{O}_2$ from marble chips because

• A. it does not react
• B. huge amount of heat is evolved
• C. the reaction is vigorous
• D. calcium sulphate is sparingly soluble and gets deposited on marble chips and stops the reaction.

Answer 1

The correct option is D calcium sulphate is sparingly soluble and gets deposited on marble chips and stops the reaction.

Dilute sulphuric acid reacts with calcium carbonate. But it is not used because the calcium sulphate which is formed during the reaction is insoluble in water. It covers the marble chips and stops the reaction.

$CaC{O}_3+H_{2}S{O}_4(dil.)\to CaS{O}_4+H_{2}O+C{O}_2$

Hence, the correct answer is option (d).