Na_2SO_3 and NaHCO_3 may be distinguished by treating their aqueous solution with:

JEE Main Chemistry question

and may be distinguished by treating their aqueous solution with:

(A)Litmus solution
(B)Dil. AcidCorrect
(C)MgO
(D)

Answer: (B)

Solution

Adding dilute acid to each salt causes both to effervesce, but the gas evolved is distinctly different: releases pungent, choking-smelling , whereas releases odourless — giving a simple, unambiguous

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Question ID VK-137921