Question

a metal carbonate a treating with an acid gives a gas b which, when passed through a solution c gives a carbonate back ,solution c reacts with d to form compound e used for decolonization Identify, a,b,c,d,e​

Answer 1

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A is calcium carbonate (CaCO3)

C is slaked lime

E is bleaching powder (CaOCl2)

B is chlorine gas

A is Calcium. When calcium carbonate reacts with HCl, it gives out CO2 gas.

CaCO3 + HCl → CaCl2 + CO2 + H2O

When CO2 is passed into lime water, it turns milky due to the formation of Calcium carbonate.

Hence, solution C is lime water

When chlorine gas is passed on dry lime water, it gives bleaching powder which is used for disinfecting water

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