Home
Class 12
CHEMISTRY
For the reaction : A+2B^(3+) rarr 2B^(...

For the reaction `:`
`A+2B^(3+) rarr 2B^(2+)+A^(2+)`
`E^(c-)` of the given redox reaction is `:`
`A^(2+)+2e^(-) rarr A` `E^(c-)=xV
`B^(3+)+e^(-) rarr B^(2+)` `E^(c-)=yV`

A

`x-2y`

B

`x+y//2`

C

`x-y`

D

`y+x`

Text Solution

Verified by Experts

The correct Answer is:
d
It is a redox reaction, thus
Cell reaction `:`
At anode `: A rarr A^(2+)+2e^(-)(` Oxidation `)`
`E^(c-)._(o x i d)=-xV,E^(c-)._(red)=xV`
At cathode `: 2B^(3+)2e^(-) rarr 2B^(2+)(` Reduction `)`
`E^(c-)._(red)=yV`
`ulbar(Cell reaction : A+2B^(3+) rarr A^(2+)+2B^(2+))`
`E^(c-)._(cell)=(E^(c-)._(red))_(c)-(E^(c-)._(red))_(a)=(y-x)V`
Promotional Banner

Similar Questions

Explore conceptually related problems

For the reaction 2A +B rarr 3C +D Which of the following does not express reaction rate ?

The electrode potential of some half cell reactions are : Cl_(2) + 2e^(-) rarr 2 Cl^(-)(aq), E^(@) = + 1.36 V O_(2)+2H^(+)(aq) + 2e^(-) rarr H_(2)O_(2) (aq) , E^(@) = + 0.65 V F_(2)+2e^(-) rarr 2F^(-)(aq), E^(@) = + 2.87 V H_(2)O+ 2e^(-) rarr H_(2)(g) + 2OH^(-) (aq), E^(@) = - 0.83 V The strongest oxidising agent is :

For the cell reaction 4Br^(-) + O_(2)+4H^(+) rarr Br_(2)+2H_(2)O E_("cell")^(@)=0.16 V , the value of log K_(c) is :

In the following half cell reactions, select the better reducing agent : Mg^(2+) + 2e^(-) rarr Mg, E^(@)= -2.37 V Fe^(3+) + 3e^(-) rarr Fe, E^(@) = -0.44 V

Given below are the half cell reactions : Mb^(2+)+2e^(-) rarr Mn, E^(@)= -1.18 V 2(Mn^(3+)+e^(-)rarr Mn^(2+)), E^(@)= +1.51V The E^(@) for 3Mn^(2+) rarr Mn + 2 Mn^(3+) will be

lim_(x rarr 0) (e^(x) + e^(-x) -2)/x^(2)=

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 ?