HelpContactFor teachers and institutes
>_StemPy Lab
Mock TestsClassesGroups

>_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

  • Dashboard
  • My Content
  • Profile
  • Log in
© 2026 senLearn. All rights reserved.HelpAboutContactPrivacy PolicyTerms of UseRefund Policy
  1. Problems
  2. /Redox Reactions

Redox Reactions

Chemistry

Oxidation and reduction, oxidation numbers, balancing redox equations and redox titrations.

+ Upload a Problem
Subtopic
31 problems
Exam:
Type:
1.
A galvanised bucket is an iron bucket with a zinc coat… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Medium
2.
The Daniell cell has E° = 1.10 V for a reaction that moves 2 mol of electrons… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsStemPy LabStemPy Lab
Hard
3.
These metals have the following standard potentials for Mⁿ⁺/M: magnesium -2.37 V, zinc -0.76 V… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsStemPy LabStemPy Lab
Medium
4.
Use E°(Ag⁺/Ag) = +0.80 V and E°(Cu²⁺/Cu) = +0.34 V… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Easy
5.
Four couples have these standard potentials: Al³⁺/Al is -1.66 V, Pb²⁺/Pb is -0.13 V, Cu²⁺/Cu is… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Hard
6.
For Zn²⁺(aq) + 2e⁻ → Zn(s), the standard electrode potential is -0.76 V… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Medium
7.
A student joins a zinc half-cell to a standard hydrogen electrode… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Medium
8.
A silver half-cell has E° = +0.80 V and an iron half-cell has E° = -0.44 V… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Easy
9.
In a Daniell cell, 0.327 g of zinc dissolves… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Medium
10.
A Daniell cell supplies a steady current of 30 mA for 90 minutes… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsStemPy LabStemPy Lab
Medium
11.
A cell is written as Ni(s) mid Ni²⁺(aq) ∥ Ag⁺(aq) mid Ag(s)… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Easy
12.
A 10.0 mL sample of bleach solution is added to excess potassium iodide in acid… New
High School (11–12) · Balancing Redox Equations and Redox TitrationsStemPy LabStemPy Lab
Medium
13.
A 25.0 mL sample of diluted hydrogen peroxide is acidified and titrated with 0.0180 mol/L potassium… New
High School (11–12) · Balancing Redox Equations and Redox TitrationsA-Level, AP, IBStemPy LabStemPy Lab
Medium
14.
A 20.0 mL sample of iron(II) sulfate solution needs 16.0 mL of 0.0150 mol/L acidified potassium… New
High School (11–12) · Balancing Redox Equations and Redox TitrationsA-Level, AP, IBStemPy LabStemPy Lab
Easy
15.
Hot nitric acid oxidises arsenic(III) sulfide to arsenic acid and sulfate ions, and is itself… New
High School (11–12) · Balancing Redox Equations and Redox TitrationsA-Level, AP, IBStemPy LabStemPy Lab
Hard
16.
In basic solution, hydrogen peroxide oxidises chromium(III) hydroxide to chromate ions: Cr(OH)₃ +… New
High School (11–12) · Balancing Redox Equations and Redox TitrationsA-Level, AP, IBStemPy LabStemPy Lab
Medium
17.
Acidified dichromate oxidises tin(II) ions to tin(IV) ions… New
High School (11–12) · Balancing Redox Equations and Redox TitrationsStemPy LabStemPy Lab
Medium
18.
In acid, the nitrate ion is reduced to nitric oxide: NO₃⁻ → NO. Balance this half-reaction. New
High School (11–12) · Balancing Redox Equations and Redox TitrationsA-Level, AP, IBStemPy LabStemPy Lab
Easy
19.
In acid, permanganate oxidises oxalate ions to carbon dioxide: MnO₄⁻ + C₂O₄²⁻ → Mn²⁺ + CO₂… New
High School (11–12) · Balancing Redox Equations and Redox TitrationsA-Level, AP, IBStemPy LabStemPy Lab
Medium
20.
Zinc reacts with very dilute nitric acid… New
High School (11–12) · Balancing Redox Equations and Redox TitrationsStemPy LabStemPy Lab
Medium
21.
Copper reacts with concentrated nitric acid and gives copper(II) nitrate, brown nitrogen dioxide… New
High School (11–12) · Balancing Redox Equations and Redox TitrationsA-Level, AP, IBStemPy LabStemPy Lab
Easy
22.
Name the kind of reaction, and say whether it is a redox reaction: (a) 2Mg + O₂ → 2MgO; (b) 2HgO →… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Medium
23.
Chlorine reacts with cold dilute alkali: Cl₂ + 2OH⁻ → Cl⁻ + OCl⁻ + H₂O… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsStemPy LabStemPy Lab
Hard
24.
For each reaction, give the oxidation numbers before and after for the elements that change, name… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Medium
25.
Find the oxidation number of (a) oxygen in H₂O₂; (b) oxygen in OF₂; (c) oxygen in KO₂; (d) hydrogen… New
High School (11–12) · Oxidation Number and Types of Redox ReactionsA-Level, AP, IBStemPy LabStemPy Lab
Hard
Page 1 of 2

Showing 1–25 of 31