Help Contact For teachers and institutes

Mock Tests Classes

StemPy Lab

Learn. Solve. Code the solutions. Test yourself.

Live examsFree mock exams, timed and rankedEveryone starts together, and your score and rank come the moment it ends.See the exams →

Learn

Physics
Chemistry
Mathematics
Biology
Python Programming
Statistics & Data Science
Classes
Groups

Practice

Problems
Quizzes
Mock Tests
Prepare for an Exam
Question Sets
Exams
Certificates
Python Labs
AI Practice Generator
Student-Created Tests

Community

Discussions
Resources
Notes
Blog

Account

Log in

© 2026 senLearn. All rights reserved.Help About Contact Privacy Policy Terms of Use Refund Policy

In acid solution, MnO₄⁻ becomes Mn²⁺. How many… | StemPy Lab

Quizzes
In acid solution, MnO₄⁻ becomes Mn²⁺. How many electrons does each ion gain?

ChemistryMediumHigh School (11–12)Redox Reactions › Oxidation Number and Types of Redox Reactions Board Exam AP A-Level IB

Created by StemPy Lab

In acid solution, $\text{MnO}_4^-$ becomes $\text{Mn}^{2+}$ . How many electrons does each ion gain?

← All Quizzes

← Which of these metals does not displace hydrogen from dilute hydrochloric acid?Which of these is not a redox reaction? →

More onRedox Reactions › Oxidation Number and Types of Redox Reactions

Discussion (0)

Log in to join the discussion.

Loading…

More questions on this topic

Which change makes no difference to the value of E° for a half-reaction?Easy
A Daniell cell has been delivering current for several hours. What has happened to the two…Medium
Why does a zinc-coated iron sheet resist rusting even where the coating is scratched?Medium
The standard potentials of four metals are aluminium -1.66 V, copper +0.34 V, nickel -0.25 V and…Medium
A cell is written Mg(s) mid Mg²⁺(aq) ∥ Ag⁺(aq) mid Ag(s). Using E° values of -2.37 V and +0.80 V…Medium

All questions on this topic →

Problems on this topic

A galvanised bucket is an iron bucket with a zinc coat…Medium
The Daniell cell has E° = 1.10 V for a reaction that moves 2 mol of electrons…Hard
These metals have the following standard potentials for Mⁿ⁺/M: magnesium -2.37 V, zinc -0.76 V…Medium
Use E°(Ag⁺/Ag) = +0.80 V and E°(Cu²⁺/Cu) = +0.34 V…Easy

All problems on this topic →