Question

preparing lime for white washing of the walls is physical change or chemical change​

Answer 1

Answer:

i) Lime water or calcium hydroxide forms when calcium oxide combines with water. This is a combination reaction. (ii) Calcium hydroxide combines slowly with carbon dioxide present in air to form a white layer of calcium carbonate on the wall. This is again a combination reaction.

Answer 2

Explanation:

(i) Lime water or calcium hydroxide forms when calcium oxide combines with water. This is a combination reaction. (ii) Calcium hydroxide combines slowly with carbon dioxide present in air to form a white layer of calcium carbonate on the wall. This is again a combination reaction.