SATHEE: Some Basic Principles Of Organic Chemistry Question 232

Some Basic Principles Of Organic Chemistry Question 232

Question: During the extraction of gold the following reactions take place $A u + C N^{-} + H_{2} O \overset{o_{2}}{\to} X,, X + Z n \to Y + A u$ Here, X and Y respectively are

Options:

A) ${[A u (C N_{4})]}^{3 -}$ and ${[Z n {(C N)}_{4}]}^{2 -}$

B) ${[A u (C N_{2})]}^{-}$ and ${[Z n {(C N)}_{6}]}^{4 -}$

C) ${[A u (C N_{4})]}^{4 -}$ and ${[Z n {(C N)}_{4}]}^{2}$

D) ${[A u (C N_{4})]}^{4 -}$ and ${[Z n {(C N)}_{4}]}^{2 -}$

Show Answer

Answer:

Correct Answer: D

Solution:

$4 A u (s) + 8 C N^{-} (a q) + 2 H_{2} O (a q) \overset{O_{2}}{\to}$ $4 {[A u \underset{X}{{(C N)}_{2}},]}^{-} + 4 O H^{-} (a q)$

$2 {[A u {(C N)}_{2}]}^{-} (a q) + Z n (s) \to \underset{Y}{{[Z n {(C N)}_{2}]}^{2 -}}, (a q) + 2 A u (s)$

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Some Basic Principles Of Organic Chemistry Question 232

Question: During the extraction of gold the following reactions take place Au+CN−+H2O→o2X,,X+Zn→Y+Au Here, X and Y respectively are

Options:

Answer:

Solution:

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Question: During the extraction of gold the following reactions take place $A u + C N^{-} + H_{2} O \overset{o_{2}}{\to} X,, X + Z n \to Y + A u$ Here, X and Y respectively are