Tollen's reagent is used for the detection of aldehyde. When a solution of `AgNO_(3)` is added to glucose with `NH_(4)OH`, then gluconic acid is formed.
`Ag^(+)toe^(-)toAg,E_(red)^(@)=0.8V`
`C_(6)H_(12)O_(6)+H_(2)OtoC_(6)H_(12)O_(7)` (Gluconic acid) `+2H^(+)+2e^(-),E_(oxd)^(@)=-0.05V`
`Ag(NH_(3))_(2)^(+)+e^(-)toAg(s)+2NH_(3),E^(@)=-0.337V`
[Use `2.303xx(RT)/(F)=0.0592` and `(F)/(RT)=38.92` at 298K]
Now answer the following three questions:
Q. `2Ag^(+)+C_(6)H_(12)O_(6)+H_(2)Oto2Ag(s)+C_(6)H_(12)O_(7)+2H^(+)`
Find in K of this reaction:

Options

A. 66.13
B. 58.38
C. 28.3
D. 46.29

Answer

B

Explanation

`2Ag^(+)+C_(6)H_(12)O_(6)+H_(2)to2Ag(s)+C_(6)H_(12)O_(7)+2H^(+),E^(@)=0.8-0.05=0.75"volt"`
`0=0.75-(0.0592)/92)logK`.
in `K=2.303xxlogK=2.303xx25.34=58.38`