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Which of the following halides react(s) with AgNO ₃( aq ) to give a precipitate that dissolves in Na ₂ ~S ₂ O ₃( aq ) ?

Options

  1. AHCl
  2. BHF
  3. CHBr
  4. DHI

Correct answer

A. HCl

Step-by-step solution

array l HX + AgNO ₃ AgX + HNO ₃( X = Cl , Br , I ) AgX +2 Na ₂ ~S ₂ O ₃ Na ₃ [ Ag ( S ₂ O ₃ )₂ ]+ NaX array

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