The D And F Block Elements Ques 66
66. While extracting an element from its ore, the ore is ground and leached with dil. potassium cyanide solution to form the soluble product potassium argento cyanide. The element is
[1989]
(a) Lead
(b) Chromium
(c) Manganese
(d) Silver
Show Answer
Solution:
- (d) Cyanide process is used in the metallurgy of Ag.
$2 Ag_2 S+8 NaCN+O_2+2 H_2 O \longrightarrow$ $4 Na[Ag(CN)_2]+4 NaOH+2 S$
$2 Na[Ag(CN)_2]+Zn \longrightarrow$
$ Na_2[Zn(CN)_4]+2 Ag \downarrow $
BETA
