An electrochemical cell is constructed using half cells in the direction of spontaneous change Fe ( OH ) 2 ( s )+2 e - rightarrow Fe ( s )+2 OH ( aq ) E 0 =-0.88 V and AgBr ( s )+ e - rightarrow Ag ( s )+ Br - ( aq ) E 0 =+0.07 V Which of the following option is correct?

Overall reaction Fe ( s )+2 OH 1 ( aq )+2 AgBr ( s ) rightleftharpoons Fe ( OH ) 2 ( s )+2 Ag ( s )+2 Br - ( aq )

Fe is reduced in the electrochemical cell

E cell 0 is an extensive property

Chemistry · Redox Reactions

JEE Main 2026 — 2 April, Morning Shift — Question 46

An electrochemical cell is constructed using half cells in the direction of spontaneous change $\mathrm{Fe}(\mathrm{OH})_{2}(\mathrm{~s})+2 \mathrm{e}^{-} \rightarrow \mathrm{Fe}(\mathrm{s})+2 \mathrm{OH}(\mathrm{aq}) \quad \mathrm{E}^{0}=-0.88 \mathrm{~V}$ and $\operatorname{AgBr}(\mathrm{s})+\mathrm{e}^{-} \rightarrow \operatorname{Ag}(\mathrm{s})+\operatorname{Br}^{-}(\mathrm{aq}) \mathrm{E}^{0}=+0.07 \mathrm{~V}$ Which of the following option is correct?

Option A:
Overall reaction $\mathrm{Fe}(\mathrm{s})+2 \mathrm{OH}^{1}(\mathrm{aq})+2 \mathrm{AgBr}(\mathrm{s})$$\rightleftharpoons \mathrm{Fe}(\mathrm{OH})_{2}(\mathrm{~s})+2 \mathrm{Ag}(\mathrm{s})+2 \mathrm{Br}^{-}(\mathrm{aq})$
Correct
Option B:
$\mathrm{E}_{\text {cell }}^{0}=-0.95 \mathrm{~V}$
Option C:
Fe is reduced in the electrochemical cell
Option D:
$\mathrm{E}_{\text {cell }}^{0}$ is an extensive property

Answer: A

Step-by-step solution

Overall reaction $\mathrm{Fe}(\mathrm{s})+2 \mathrm{OH}^{-}(\mathrm{aq})+2 \mathrm{AgBr}(\mathrm{s}) \rightleftharpoons \mathrm{Fe}(\mathrm{OH})_{2}(\mathrm{~s})+ 2 \mathrm{Ag}(\mathrm{s})+2 \mathrm{Br}^{-}(\mathrm{aq})$ $\mathrm{E}_{\text {cell }}^{o}=\mathrm{E}_{\mathrm{R}(\text { cathode })}^{o}-\mathrm{E}_{\mathrm{R}(\text { anode })}^{o}$ $=0.07-(-0.88)=0.95 \mathrm{~V}$

Answer key and solution verified before publishing.

Practise Redox Reactions

Start with this question, then two more from the same chapter — with a tutor that explains every step. Free.

Solve a similar one free

Exam: JEE Main 2026
Paper: 2 April, Morning Shift
Subject: Chemistry
Chapter: Redox Reactions
Topic: n-Factor, Redox Titrations, Self Indicator & Miscellaneous Cases

Which of the following sets includes all the species that will change the orange colour of K 2 Cr 2 O 7 in acidic medium?

Answer: A

Step-by-step solution

Practise Redox Reactions

More Redox Reactions questions from this paper