Question

A metal carbonate x on reacting with an acid gives a gas which passed through a solution why is the carbonate black on your hands a gas ji

Answer 1

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Corrected and completed question is attached above :)

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According to the question :

X is calcium carbonate :  (CaCO3)

Y is slaked lime : [Ca(OH)2]

Z is bleaching powder : (CaOCl2)

G is chlorine (gas)

The reactions involved are :

- image attached above :)

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