Question

compound A is when heated produce gas B which when passed over lime water gives back a identify and we also give reaction involved​

Answer 1

Answer:

Calcium oxide reacts with water to form calcium hydroxide. Calcium hydroxide reacts with excess carbon dioxide to form calcium hydrogen carbonate.

Explanation:

hope it helps you

Answer 2

Answer:

A=CaCO3 AND B=CO2

Explanation:

• CaCO3+heat》CaO+CO2
• CaO(lime water)+CO2》CaCO3(ppt.)