Home
Class 12
CHEMISTRY
For I(2)+2e^(-) rarr 2I^(c-), standard r...

For `I_(2)+2e^(-) rarr 2I^(c-)`, standard reduction potential `=+0.54 V.` For `2Br^(c-) rarr Br_(2)+2e^(-)`, standard oxidation potential `=-1.09V.` For `Fe rarr Fe^(2+)+2e^(-)`, standard oxidation potential `=+0.44V`. Which of the following reactions is `(` are `)` spontaneous ?

A

`Br_(2)+2I^(c-) rarr 2Br^(c-)+I_(2)`

B

`Fe+Br_(2) rarr Fe^(2+)+2Br^(c-)`

C

`Fe +I_(2) rarr Fe^(2+)+2I^(c-)`

D

`I_(2)+2Br^(c-) rarr 2I^(c-) +Br_(2)`

Text Solution

Verified by Experts

The correct Answer is:
a,b,c
`E^(c-)._(cell)=1.09-0.54Vgt0 `
`b. E^(c-)._(cell)=1.09-(-0.44)Vgt0`
`c.` `E^(c-)._(cell)=0.54-(-0.44)Vgt0`
`d.` `E^(c-)._(cell)=0.54-1.09Vlt0`
Promotional Banner

Similar Questions

Explore conceptually related problems

The reaction: Zn^(2+) + 2e^(-) rarr Zn has a standard reduction potential of -0.76 V . This means that

The standard reduction potentials of zinc and silver are - 0.76 and 0.8 V respectively. Which of the following reactions actually occurs ?

The standard reduction potential for the reaction Sn^(4+) + 2erarr Sn^(2+) is + 0.15 V . Calculate the free energy change of the reaction.

In a simple electrochemical cell, the half cell reduction reaction with their standard electrode potentials are : Pb(s)-2e^(-) rarr Pb^(2+)(aq) , E^(@)= - 0.30 V Ag(s) -e^(-) rarr Ag^(+) (aq), E^(@)= + 0.80 V Which of the following reaction takes place ?

The standard reduction potential for Zn^(2+)//Zn, Ni^(2+)//Ni , and Fe^(2+)//Fe are -0.76, -0.23 and -0.44V respectively. The reaction X+Y^(2+) rarr X^(2+)+Y will be spontaneous when :