General Principles And Processes Of Isolation Of Metals Question 2
Question 2 - 24 January - Shift 2
The metal which is extracted by oxidation and subsequent reduction from its ore is :
(1) $Al$
(2) $Ag$
(3) $Cu$
(4) $Fe$
Show Answer
Answer: (2)
Solution:
Formula: Purification or Refining of Metal
Ag.
$4 Ag+8 CN^{-}+O_2+2 H_2 O \to 4[Ag(CN)_2]^{-}+4 OH$
$2[Ag(CN)_2]^{-1}+Zn \to 2 Ag \downarrow+[Zn(CN)_4]^{-2}$
