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Which reagent is used to remove \text{SO}_{4}^{-} \text{ and }\mathrm{Cl}^{-}

Option: 1

\mathrm{BaSO}_{4}


Option: 2

\mathrm{NaOH}


Option: 3

\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}


Option: 4

\mathrm{KOH}


Answers (1)

best_answer

As we have learnt, 

\mathrm{PbSO}_{4}\text{ and }\mathrm{PbCl}_{2} are insoluble in cold water and hence the soluble reagent \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2} can be used to remove \mathrm{SO}_{4}^{2-}\text{and }\mathrm{Cl}^{-} in the form of their respective precipitates.

Hence, the correct answer is Option (3)

Posted by

seema garhwal

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