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Question: Answered & Verified by Expert
To a solution of colourless sodium salt, a solution of lead nitrate was added to have a white precipitate which dissolves in warm water and reprecipitates on cooling. Which of the following acid radical is present in the salt?
ChemistryPractical ChemistryWBJEEWBJEE 2022
Options:
  • A $\mathrm{Cl}^{-}$
  • B $\mathrm{SO}_4{ }^{2-}$
  • C $\mathrm{S}^{2-}$
  • D $\mathrm{NO}_3^{-}$
Solution:
2977 Upvotes Verified Answer
The correct answer is: $\mathrm{Cl}^{-}$
$2 \mathrm{NaCl}+\mathrm{Pb}\left(\mathrm{NO}_3\right)_2 \rightarrow \mathrm{PbCl}_2(\mathrm{ppt})+2 \mathrm{NaNO}_3$

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