Q.

CaCO3(A)→ΔCaO(B)+CO2 CaO(B)+H2O→ Ca(OH)2(C) Ca(OH)2(C)+CO2→ CaCO3(A) Ca(OH)2(C)+NH4Cl→ΔNH3(D) NH3(D)+H2O+CO2→ NH4HCO3(E) NH4HCO3(E)+NaCl→ NaHCO3(F) NaHCO3(F)→ΔNa2CO3+CO2+H2O D and E and F are:

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a

NH3, NH4Cl, NH4HCO3

b

NH3NH4HCO3, NaHCO3

c

NH4HCO3,Na2CO3, NaHCO3

d

None of the above

answer is B.

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Detailed Solution

CaCO3(A)→ΔCaO(B)+CO2 CaO(B)+H2O→ Ca(OH)2(C) Ca(OH)2(C)+CO2→ CaCO3(A) Ca(OH)2(C)+NH4Cl→ΔNH3(D) NH3(D)+H2O+CO2→ NH4HCO3(E) NH4HCO3(E)+NaCl→ NaHCO3(F) NaHCO3(F)→ΔNa2CO3+CO2+H2O
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