Question

a compound A is heated then, a gas is B is evolved and a residue C is left. Then C is reated with water and D compound is formed then the gas B is passed through D in excess and then again compound A is formed. Identity A,B,C,D?

Answer 1

A is CaCo3

B is Co2

C is CaO

D is Ca(OH)2

I hope the abv answers are ryt...

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Answer 2

Answer:

2 CH₃COOH + 2 Na ⇒  2 CH₃COONa + H₂ ↑

      ( A )                                   ( B )

CH₃COOH + C₂H₅OH ⇒  CH₃COOC₂H₅ + H₂O

                        ( C )                 ( D )

CH₃COOC₂H₅ + NaOH  ⇒ C₂H₅OH + CH₃COONa

Therefore we identified

A - CH₃COOH

B - CH₃COONa

C - C₂H₅OH

D - CH₃COOC₂H₅