Question

84. A salution of a substance x is used

of a
for
il Name the sulsstance 'x' and the
white kashing
write its farmula
il y Write the reaction the substance
la' named in il above with water.
of
dne

Answer 1

Following are the answer to this question:

Step-by-step explanation:

(1) Calcium oxide (CaO) is also referred to as quicklime. It is the solution for the substance used for whitewashing.

Whenever it reacts with water (
`H_2O`) and absorbs carbon dioxide (
`CO_2`), it then formed calcium carbonate (
`CaCO_3`), which produced a hard laminate on the walls, to first be whitened by the production of calcium hydroxide (CaOH).

(2) Slackened lime or calcium hydroxide arises whenever the fast limestone reacts with water.

`CaO(s) + H_2O(l) \rightarrow Ca(OH)_2(aq).`