Question

A solution of a substance ‘X’ is used for white washing.
i. Name the substance ‘X’ and write its formula.
ii. Write the reaction of the substance ‘X’ named in (i) above with water.

Answer 1

i. The given substance ‘X’ is quick lime or calcium oxide and its formula is CaO.
ii. Quick lime reacts with water to form calcium hydroxide (slaked lime).