wiz-icon
MyQuestionIcon
MyQuestionIcon
2826
You visited us 2826 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following is the cell reaction that occurs when the following half-cells are combined?
I2+2e2I(1M); Eo=+0.54V
Br2+2e2Br(1M);Eo=+1.09V

A
2Br+I2Br2+2I
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
I2+Br22I+2Br
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
2I+Br2I2+2Br
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
2I+2BrI2Br2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 2I+Br2I2+2Br
A galvanic cell or simple battery is made of two electrodes. Each of the electrodes of a galvanic cell is known as a half cell. In a battery, the two half cells form an oxidizing-reducing couple. When two half cells are connected via an electric conductor and salt bridge, an electrochemical reaction is started.
Reduction potential of both I2 and Br2 is given. We have to note that more the value of reduction potential then less the element has the tendency to get reduced and hence I2 having more reduction potential acts as anode i.e. undergoes oxidation. And Br2 having less reduction potential than I2 undergoes reduction and acts as cathode.


2II2+2e (Oxidation)
Br2+2e2Br (Reduction)
____________________________
2I+Br2I2+2Br is net cell reaction
___________________________

Hence option (C) is correct.

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Redox Reactions
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon