Verified Solution • 2025–26 Session moderate

QAIPM-2002-Ch-2796: NEET 2002 Chemistry - Class 12 AIPM-2002-Ch-2796 Solution: In the silver plating of copper, \(K[Ag(CN)_2]\) is used…

In the silver plating of copper, K[Ag(CN)2]K[Ag(CN)_2] is used instead of AgNO3AgNO_3. The reason is

Multiple Choice Options

  • A a thin layer of Ag is formed on Cu
  • B more voltage is required
  • C Ag+Ag^+ ions are completely removed from solution
  • D less availability of Ag+Ag^+ ions, as Cu can not displace Ag from [Ag(CN)2]−[Ag(CN)_2]^- ion.

Step-by-Step Verified Solution

Copper being more electropositive readily precipitate silver from their salt (Ag + ) solution. Cu + 2AgNO 3 _ Cu(NO 3 ) 2 + Ag In K[Ag(CN) 2 ] solution a complex anion [Ag(CN) 2 ] � is formed so Ag + ions are less available in the solution and Cu cannot displace Ag from this complex ion.

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