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Question

Which of the following reactions is not associated with 'solvay's 'process of manufacture of sodium carbonate?

A

NH3 + H2 + CO2 NH4HCO3

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B

NaCl + NH4HCO3 NaHCO3 + NH4Cl

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C

2NaHCO3 Δ Na2CO3 + H2O + CO2

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D

2NaOH + CO2 Na2CO3 + H2O

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Solution

The correct option is D

2NaOH + CO2 Na2CO3 + H2O


Raw materials are NaCl,CaCO3,NH3:

The other reactions are all parts of the Solvay or Ammonia-soda process:
NH3 + H2 + CO2 NH4HCO3
NaCl + NH4HCO3 NaHCO3 + NH4Cl
2NaHCO3 Δ Na2CO3 + H2O + CO2

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