Question

A solution of a substance X is used for whitewashing.
(1) Name the substance X and write its formula.
(ii) Write the reaction of the substance X named in (1) above with
water.​

Answer 1

Answer:

calcium oxide

Explanation:

it is also known as quicklime.

Cao

Answer 2

Answer:

1) substance X is calcium oxide that is CaO

ii) during whitewashing calcium oxide react with water to form calcium hydroxide which later react with carbon dioxide and form a shining layer on wall

CaO+H2O------>Ca(OH)2

Explanation:

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