Question

(a) A metal carbonate X on reacting with an acid gives a gas which when passed through a solution Y gives the carbonate back. On the other hand, a gas G that is obtained at anode during electrolysis of brine is passed on dry Y, it gives a compound Z, used for disinfecting drinking water. Identity X, Y, Gand Z.(b) Write the chemical formula of plaster of paris.

Answer 1

Answer:

8g7t6f5

Explanation:

vyvytfdtdtxtxtstdycugigutdydtd4d5d5d6f6fyfyf6f6f6f6f5f5f6f66d4445x5444456ff6g7g8h

Answer 2

X = Calcium Carbonate

Y = Calcium Hydroxide

G = Chlorine Gas

Z = Calcium Oxychloride

Explanation:

When calcium carbonate reacts with hydrochloric acid, it produces carbon dioxide which is a gas.

$\bold{\mathrm{CaCO}_{3}+ 2 \mathrm{HCl} \longrightarrow \mathrm{CaCl}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2} \uparrow}$

When carbon dioxide gas is passed through calcium hydroxide, it produces calcium carbonate which is milky white in colour.

$\bold{\mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{CO}_{2} \longrightarrow \mathrm{CaCO}_{3} \downarrow+\mathrm{H}_{2} \mathrm{O}}$

Brine is sodium chloride.

When sodium chloride undergoes electrolysis, it produces chlorine gas.

$\bold{2 \mathrm{NaCl}+2 \mathrm{H}_{2} \mathrm{O} \stackrel{\text { Electrolysis }}{\longrightarrow} 2 \mathrm{NaOH}+\mathrm{Cl}_{2}+\mathrm{H}_{2}}$

When chlorine gas is passed through calcium hydroxide, it produces calcium oxychloride.

$\bold{\mathrm{Ca}(\mathrm{OH})+\mathrm{Cl}_{2} \longrightarrow \mathrm{CaOCl}_{2}+\mathrm{H}_{2} \mathrm{O}}$