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General Principles and processes of Isolation of Elements
easy
Statement $I :$ Leaching of gold with cyanide ion in absence of air $/ O _{2}$ leads to cyano complex of $Au ( III )$.
Statement $II :$ Zinc is oxidized during the displacement reaction carried out for gold extraction.
In the light of the above statements, choose the correct answer from the options given below.
A
Both Statement $I$ and Statement $II$ are correct
B
Both Statement $I$ and Statement $II$ are incorrect
C
Statement $I$ is correct but Statement $II$ is incorrect
D
Statement $I$ is incorrect but Statement $II$ is correct
(JEE MAIN-2022)
Solution
Statement$-1 :$ wrong, $Au ^{+}$is correct, not $Au ^{+3}$
Statement$-2 :$ correct
Standard 12
Chemistry
