Question

Question 18.
Which of the following substances will not give carbon dioxide on treatment with dilute acid?

(a) Marble
(b) Limestone
(c) Baking soda
(d) Lime

Answer 1

Lime, (calcium oxide) does not evolve ${\text{CO}}_2$ when reacted with a dilute acid. Other given compounds are carbonates and hydrogen carbonates. They evolve ${\text{CO}}_2$ with dilute acid as we can see from the reactions given below:
$\text{CaO}+{\text{H}}_2\text{O}⟶{\text{Ca(OH)}}_2$
${\text{Ca(OH)}}_2+\text{HCl}⟶{\text{CaCl}}_2+2{\text{H}}_2\text{O}$

Hence, option (d) is the correct answer.