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

Explanation:

(i) Substance X is Calcium Oxide whose solution we use in water which is used for white washing. The formula of substance X is Cao.

(ii) Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of heat.

Ca0(s) + H2O(l) → Ca(OH)2(aq)

(Quick Lime) (Water) (Slaked Lime)

Answer 2

Answer:

Ans. i. The substance whose solution is water is used for white washing is calcium oxide. Its formula is CaO.

ii. CaO(s) + H2O(l) Ca(OH)2(aq)