Question

Which compound in the table reacts with acids to release carbon dioxide?
A. NaCI
B. Caso
C. CaCO3
D. MgSO4​

Answer 1

Answer:

option c is the correct answer.

Answer 2

C. CaCO3 reacts with acids to release carbon dioxide.

Reaction of CaCO3 with acid is given below-

Hydrochloric acid

$CaCO_{3}+2HCl$ → $CaCl_{2}+H_{2}O+CO_{2}$

Sulphuric acid

$CaCO_{3} +H_{2} SO_{4}$ → $CaSO_{4} + H_{2}O+CO_{2}$

Thus, it can be seen that carbon dioxide is liberated along with water when calcium carbonate reacts with acid.

Reaction of NaCl with sulphuric acid is given below:

$2NaCl+H_{2}SO_{4}$ → $Na_{2}SO_{4}+2HCl$

Reaction of MgSO4 with sulphuric acid is given below:

$MgSO_{4}+2HCl$ → $MgCl_{2}+H_{2}SO_{4}$

Thus, it can be seen that only calcium carbonate liberates carbon dioxide on reaction with acid.