Question

A white substance P when heated gives another substance A and gas R. Substance Q also react with water for which washing gas R can change lime water milky. Identify P and A with proper equation and type of reaction.​

Answer 1

The white substance P that when heated gives substance A and gas R is calcium carbonate (CaCO3). The type of reaction is a decomposition reaction. Substance Q reacts with water and gas R to form a milky solution. The gas R is carbon dioxide (CO2). The type of reaction is an acid-base reaction.

Step-by-step explanation:

The white substance P that when heated gives substance A and gas R is calcium carbonate (CaCO3). The equation for this reaction is:

P + heat → A + R

The type of reaction is a decomposition reaction because substance P breaks down into its constituent elements.

Substance Q reacts with water and gas R to form a milky solution. The gas R is carbon dioxide (CO2). The equation for this reaction is:

Q + H2O → CO2 + milky solution

The type of reaction is an acid-base reaction where substance Q, an acid, reacts with water to produce carbon dioxide gas and a milky solution.