Question

assertion :- A shiny white finish on the walls is obtained after two to three days of completion of white washing on the walls
Reason :- CaO reacts with CO2 to form calcium hydrogen carbonate which gives shiny white wash​

Answer 1

Answer: assertion :- A shiny white finish on the walls is obtained after two to three days of completion of white washing on the walls

Reason :- CaO reacts with CO2 to form calcium hydrogen carbonate which gives shiny white wash​

Explanation:

In whitewash Calcium hydroxide is present. Calcium hydroxide reacts slowly with the carbon dioxide in air to form a thin layer of calcium carbonate on the walls. Calcium carbonate is formed after two to three days of white washing and gives a shiny finish to the walls. Both A and R are true and R is the explanation for A.