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in S - block elements - alkali and alkaline earth metals by (63.8k points)

The pairs of compound which cannot exist together in aqueous solution are 

(A) NaH2 PO4 and Na2HPO

(B) Na2CO3 and NaHCO

(C) NaOH and NaHPO

(D) NaHCO3 and NaOH

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Best answer

(C) NaOH and NaH2 PO4 

(D) NaHCO3 and NaOH.

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