Which of the following substances will NOT give carbon dioxide on treatment with dilute acid?

Correct option is B

The correct answer is (b) Lime.
· Lime (calcium oxide, CaO) does not give carbon dioxide when treated with dilute acid. Instead, it reacts with water to form calcium hydroxide (slaked lime). On the other hand, substances like marble, limestone, and baking soda contain carbonate or bicarbonate ions, which release carbon dioxide upon reaction with dilute acids.
Explanation:
· Marble (a), Limestone (c): Both primarily consist of calcium carbonate (CaCO3) and release CO2​ when treated with dilute acid: CaCO3+2HCl→CaCl2+H2O
· Baking Soda (d): Contains sodium bicarbonate (NaHCO3NaHCO_3NaHCO3​), which also releases CO2 on reaction with dilute acid: NaHCO3+HCl→NaCl+H2O+CO2
Lime (b) Reaction:
· Lime reacts with water to form slaked lime but does not release CO2​: CaO+H2O→Ca(OH)2