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4. d and f- block elements — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry4. d and f- block elements1 Mark
MCQ
The anode mud in the electrolytic refining of silver contains
  • A
    $Zn, \,Cu, \,Ag,\, Au$
  • B
    $Zn,\, Ag,\, Au$
  • ✓
    $Au$ only
  • D
    $Cu, \,Ag, \,Au$
✓

Answer

Correct option: C.
$Au$ only
c
$Au$ is less reactive than $Ag$. Hence, it remains in the anode mud. Metals that are more reactive than $Ag$ will be in the electrolytic solution. The anode mud in the electrolyte refining of silver contains $Au.$

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