Select Goal &
City
Select Goal
Explore
Question:
In a reaction:\( MnO_4^- + 8H^+ + 5e \, \overset{A}⇢ + H_2O\)
A stands for:
In a reaction:\( MnO_4^- + 8H^+ + 5e \, \overset{A}⇢ + H_2O\)
A stands for:
A stands for:
Updated On: Sep 19, 2024
- $Mn^{3+}$
- $Mn^{4+}$
- $Mn^{2+}$
- $Mn^{+}$
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
The correct option is (C) : $Mn^{2+}$
Was this answer helpful?
0
0
Top Questions on Electrochemical Cells
- Consider the following 4 electrodes
A : Ag+ (0.0001 M)/Ag(s) ; B : Ag+ (0.1 M) / Ag(s)
C : Ag+ (0.01 M)/Ag(s) ; D : Ag+ (0.001 M) / Ag(s); \(E^{\degree}_{Ag^{+/Ag}}\)=+ 0.80 V
Then reduction potential in volts of the electrodes in the order- KCET - 2023
- Chemistry
- Electrochemical Cells
- In metallurgy the term “gangue” is used for :
- JEE Main - 2022
- Chemistry
- Electrochemical Cells
- Net cell reaction of $Pt \left| H _{2}(640\, mm )\right| HCl \left| H _{2}(510\, mm )\right| Pt$.
- BITSAT - 2019
- Chemistry
- Electrochemical Cells
- $CuSO_4$ solution is electrolysed for $15$ minutes to deposit $0.4725\, g$ of copper at the cathode. The current in amperes requited is (Faraday = $96.500 \,C\,mol^{-1}$. atomic weight of copper = $63$)
- AP EAMCET - 2019
- Chemistry
- Electrochemical Cells
- The reduction potential at $pH = 14$ for the $Cu^{2+} /Cu$ couples is [ Given , $E^{\circ}_{Cu^{2+}}/Cu = 0.34 \,V; K_{sp} Cu(OH)_2 = 1\times 10^{-19}$
- AIIMS - 2012
- Chemistry
- Electrochemical Cells
View More Questions
Questions Asked in CUET exam
- A molecule X associates in a given solvent as per the following equation:
X ⇌ (X)n
For a given concentration of X, the van’t Hoff factor was found to be 0.80 and the
fraction of associated molecules was 0.3. The correct value of ‘n’ is:- CUET (UG) - 2024
- Solutions
- If \(A = \begin{bmatrix} 3 & 2 \\ -1 & 1 \end{bmatrix} \quad \text{and} \quad B = \begin{bmatrix} -1 & 0 \\ 2 & 5 \\ 3 & 4 \end{bmatrix},\)then \((BA)^T\) is equal to:
- CUET (UG) - 2024
- Matrices
- Subject to constraints: 2x + 4y ≤ 8, 3x + y ≤ 6, x + y ≤ 4, x, y ≥ 0; The maximum value of Z = 3x + 15y is:
- CUET (UG) - 2024
- Maxima and Minima
- If \( A = \begin{bmatrix} K & 4 \\ 4 & K \end{bmatrix} \) and \( |A^3| = 729 \), then the value of \( K^8 \) is:
- CUET (UG) - 2024
- Matrices
- A company produces 'x' units of geometry boxes in a day. If the raw material of one geometry box costs ₹2 more than the square of the number of boxes produced in a day, the cost of transportation is half the number of boxes produced in a day, and the cost incurred on storage is ₹150 per day. The marginal cost (in ₹) when 70 geometry boxes are produced in a day is:
- CUET (UG) - 2024
- Profit and Loss
View More Questions
SUBSCRIBE TO OUR NEWS LETTER
COLLEGE NOTIFICATIONSEXAM NOTIFICATIONSNEWS UPDATES
Download the Collegedunia app on 
© 2024 Collegedunia Web Pvt. Ltd. All Rights Reserved