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 the anode during electrolysis of brine is passed on dry Y, it gives a compound Z, used for disinfecting drinking water. Identify X, Y, G and Z.

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Solution

X is calcium carbonate and the gas evolved is carbon dioxide, when calcium carbonate reacts with acid.

${CaCO}_{3} + Dil .2 HCl ⟶ {CaCl}_{2} + H_{2} O + {CO}_{2} ↑$

Solution Y is lime water ${Ca(OH}_{2})$ because, when ${CO}_{2}$ is passed through it, it gives the carbonate back as shown by the given equation.

${Ca(OH)}_{2} Y + {CO}_{2} ⟶ {CaCO}_{3} X ↓ + H_{2} O$

The gas evolved at anode during electrolysis of brine is chlorine (G).

$2 NaCl Sodium chloride (brine) + 2 H_{2} O Electrolysis ⟶ 2 NaOH + {Cl}_{2} (g) Chlorine gas (G) + H_{2} (g)$

When chlorine gas is passed through dry ${Ca(OH)}_{2}$ (Y), it produces bleaching powder (Z) used for disinfecting drinking water.

${Ca(OH}_{2}) + {Cl}_{2} ⟶ {CaOCl}_{2} Bleaching powder (Z) + H_{2} O$

Hence, Z is calcium oxy-chloride ${CaOCl}_{2}$ or bleaching powder.

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A metal carbonate X on reacts with acid and 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 the anode during electrolysis of brine is passed on dry Y, it gives a compound Z, used for disinfecting drinking water. Identify X, Y, G and Z.

Q. 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 the anode during electrolysis of brine is passed on dry

Y

, it gives a compound

Z

, used for disinfecting drinking water. Identity

X, Y, G

and

Z

Q. 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, G and Z. Also,write the chemical reactions involved.

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A metal carbonate X on treatment with a mineral acid liberates a gas which when passed through aqueous solution of a substance Y gives back X. The substance Y on reaction with the gas obtained at anode during electrolysis of brine gives a compound Z which can decolorise coloured fabrics. The compounds X, Y and Z respectively are

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