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Q.

Find the number of compounds which have yellow colour ppt. from the given compounds:
${Ag}_{2} {CrO}_{4}, {PbCrO}_{4}, {Hg}_{2} {CrO}_{4}, {BaCrO}_{4}$

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answer is 2.

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Detailed Solution

PbCrO₄ and BaCrO₄ are of yellow colour but ${Ag}_{2} {CrO}_{4}$ and ${Hg}_{2} {CrO}_{4}$ are of red colour ppt

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