CBSE 2025 · Region 4 · Set 1 · Q11 · 1 mark
What amount of electric charge is required for the reduction of $\displaystyle 1$ mole of $\displaystyle \mathrm{MnO}_{4}^{-}$into $\displaystyle \mathrm{Mn}^{2+}$ ?
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 5$ F
ElectrochemistryNernst EquationApplymcqeasy
More from Electrochemistry
- Kohlrausch gave the following relation for strong electrolytes: Λ m=Λ m^°-A √C Which of the following…2025 · asked 4×
- (i) What should be the signs (positive/negative) for E^° Cell and Δ G^° for a spontaneous redox reaction…2023 · asked 3×
- Batteries and fuel cells are very useful forms of galvanic cell. Any battery or cell that we use as a source…2024 · asked 3×
- (i) Calculate emf of the following cell at 25°C: Zn( s) Zn^2+(0 · 001 M) Cd^2+(0 · 1 M) Cd( s) Given: E Zn^2+…2024 · asked 3×
- In a galvanic cell, chemical energy of a redox reaction is converted into electrical energy, whereas in an…2024 · asked 3×
- (i) For a galvanic cell, the following half reactions are given. Decide, which will remain as reduction…2025 · asked 3×
- Write the cell reaction and calculate the e.m.f. of the following cell at 298 K: ( 3 + 2 = 5 ) Sn(s)…2025 · asked 3×
- Four half reactions I to IV are shown below: I. 2 Cl l^- → Cl 2+2 e^- II. 4 OH^- → O 2+2 H 2 O+2 e^- III.…2023 · asked 3×
CBSE Class 12 Chemistry past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.