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

$N H_{3} + H_{2} + C O_{2} ⟶ N H_{4} H C O_{3}$

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$N a C l + N H_{4} H C O_{3} ⟶ N a H C O_{3} + N H_{4} C l$

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$2 N a H C O_{3} Δ \to N a_{2} C O_{3} + H_{2} O + C O_{2}$

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$2 N a O H + C O_{2} ⟶ N a_{2} C O_{3} + H_{2} O$

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Solution

The correct option is D
$2 N a O H + C O_{2} ⟶ N a_{2} C O_{3} + H_{2} O$

Raw materials are $N a C l, C a C O_{3}, N H_{3}$ :

The other reactions are all parts of the Solvay or Ammonia-soda process:
$N H_{3} + H_{2} + C O_{2} ⟶ N H_{4} H C O_{3}$
$N a C l + N H_{4} H C O_{3} ⟶ N a H C O_{3} + N H_{4} C l$
$2 N a H C O_{3} Δ ⟶ N a_{2} C O_{3} + H_{2} O + C O_{2}$

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