Home
Class 12
CHEMISTRY
In the process of extraction of gold , ...

In the process of extraction of gold , Roasted gold ore ` + CN_((aq))^(-) + H_(2)O overset(O_(2))to [X] + [OH^(-)]`
` [X] + Zn to [Y] + Au`
Indentify the complexes [X] and [Y]

A

`X = [Au(CN)_(2)]^(-), Y = [Zn(CN)_(4)]^(2-)`

B

`X = [Au (CN)_(4)]^(3-), Y = [Zn(CN)_(4)]^(2-)`

C

`X = [Au(CN)_(2)]^(-), Y = [Zn(CN)_(6)]^(4-)`

D

`X = [Au(CN)_(4)]^(-), Y = [Zn(CN)_(4)]^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

In the process of extraction of gold. Roasted gold ore +CN^(-)+H_(2)O overset(O_(2))rarr [X]+OH^(-) [X]+Znrarr [Y]+Au Identify the complexes [X] and [Y] .

In the process of extraction of gold, Roasted gold ore +CN^(-)+H_2Ooverset(o_2)rarr[X]+OH^(-) [X]+Znrarr[Y]+Au Identify the complexes [X] and [Y]

2DCDO overset(OH^(-))rarr [X] and [Y] are

KO_(2)+CO_(2)+H_(2)O overset(m ore CO_(2)) to [X]+[Y] Products [X] and [Y] are respectively:

Following reactions take place during extraction of gold 4Au+8CN^(-)+ 2H_(2)O + O_(2) to 4[Au(CN)_(2)]^(-)+ 4OH^(-) 2[Au(CN)_(2)]^(-) + Zn to 2Au + [Zn(CN)_(4)]^(2-) Zinc in the extraction of gold acts as a/an

The compound X and Y in below reaction can be Ph-NH*NH_(2)+ (X) + (Y) overset(-H_(2)O)(to)

Consider the reaction fo extraction of gold from its ore Au +2CN^(-) (aq)+(1)/(4)O_(2) (g)+(1)/(2)H_(2)O rarr Au(CN)_(2)^(-) +OH^(-) Use the following data to calculate DeltaG^(@) for the reaction K_(f) [Au(CN)_(2)^(-)] = X {:(O_(2)+2H_(2)O +4e^(-)rarr4OH^(-),:,E^(@) =+0.41 "volt"),(Au^(3+)+3e^(-)rarr Au,:,E^(@) = +1.5 "volt"),(Au^(3+)+2e^(-)rarr Au^(+),:,E^(@) =+1.4 "volt"):}

Na_(2)B_(4)O_(7). 10H_(2) O overset(Delta)(to) X overset(Delta)(to) Y + Z ,X Y and Z in the reaction are

What are the species X and Y in the following X+H_(2)OtoH_(2)Cr_(2)O_(7)overset(OH^(-))toY