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NTA Abhyas JEE Main2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

Ag 2 S + NaCN → A A + Zn → B (B) is a metal. Hence, (A) and (B) are

Options

  1. ANa 2 Zn ( CN ) 4 , Zn
  2. BNa 2 Ag ( CN ) 2 , Ag
  3. CNa 2 Ag ( CN ) 4 , Ag
  4. DNa 3 Ag ( CN ) 4 , Ag

Correct answer

B. Na 2 Ag ( CN ) 2 , Ag

Step-by-step solution

Ag 2 S + 4 NaCN → 2 Na Ag CN 2 + Na 2 S A 2 Na Ag CN 2 + Zn → 2 Ag + Na 2 Zn CN 4 B

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