The pair of compounds which cannot exist together in aqueous solution

1.	The pair of compounds which cannot exist together in aqueous solution is
Answer» `Na_(2)CO_(3)` and `NaHCO_(3)` `NaHCO_(3)` and NaOH NaOH and `NaH_(2)PO_(4)` Both (B) and (C ). SOLUTION :The pairs would involve acid base reaction to form salt and water. `NaHCO_(3)+NaOH rarrNa_(2)CO_(3)+H_(2)O` `2NAOH + NaH_(2)PO_(4)rarrNa_(3)PO_(4)+2H_(2)O`

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