Na2SO3, Na2S2O3, Na2CO3, Na2CrO4 are separately treated with AgNO3 solution. In how many cases is/are red ppt. obtained ?
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Solution
Only Na2CrO4 gives red ppt of Ag2CrO4 on reaction with AgNO3. The compounds Ag2SO3 and Ag2S2O3 are white in colour and Ag2CO3 is yellow in colour. Na2CrO4+2AgNO3→Ag2CrO4↓(red)+2NaNO3