A solution of white crystals gives a yellow precipitate with AgNO3 but no precipitate with a solution of Na2CO3. The action of conc. H2SO4 on the crystals yields a brown gas. The crystals are of:

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NaNO3

KCI

CaON32

NaBr

answer is D.

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Detailed Solution

Only Bromides and Iodides give yellow ppt with silver nitrate solution.