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Question

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


  1. CaCO3,Ca(OH)2,CaOCl2

  2. Ca(OH)2,CaO,CaOCl2

  3. CacO3,CaOCl2,Ca(OH)2

  4. Ca(OH)2,CaCO3,CaOCl2


Solution

The correct option is A

CaCO3,Ca(OH)2,CaOCl2


CaCO3+HClCaCl2+H2O+CO2       (x)Ca(OH)2+CO2CaCO3+H2O       (y)Ca(OH)2+Cl2CaOCl2                                    (z)

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