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N a O H, N a_{2} C O_{3}, N H_{4} C l

C H_{3} C O O H

N a O H, N a_{2} C O_{3}, N H_{4} C l, C H_{3} C O O h

N a_{2} C O_{3}, N H_{4} C l, C H_{3} C O O H, N a O H

N H_{4} C l, C H_{3} C O O H, N a O H, N a_{2} C O_{3}

C H_{3} C O O H, N H_{4} C l N a_{2} C O_{3}, N a O H

ANS : 3

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