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JEE Advanced Redox Reactions and Titrations questions with solutions

Oxidation numbers, balancing redox equations and redox titrations. 18 questions from our 2016–2025 JEE Advanced pattern papers, from the Class 11 Chemistry syllabus. Each has the answer and a full solution.

Also practise: Redox Reactions and Titrations for JEE Main

JEE Advanced 2025

A 0.500 g sample contains only FeC2O4 (molar mass 143.86 g mol^-1, 60% by mass) and Fe2(C2O4)3 (molar mass 375.75 g mol^-1, 40% by mass). In acidic…JEE Advanced 2025 Paper 1 · hard
Match each reaction in List-I with the oxidation state of the element named in List-II. List-I (P) Cu + dilute HNO3: nitrogen in the colourless gas…JEE Advanced 2025 Paper 1 · medium
A 1.600 g mixture of FeC2O4 (molar mass 144 g mol^-1) and Fe2(C2O4)3 (molar mass 376 g mol^-1) is dissolved in dilute H2SO4 and titrated with 0.120 M…JEE Advanced 2025 Paper 2 · medium

JEE Advanced 2024

A 25.0 mL solution contains 0.020 M FeC2O4 and 0.010 M Fe2(C2O4)3. In acidic medium it is titrated with 0.020 M KMnO4 (which is reduced to Mn^2+).…JEE Advanced 2024 Paper 1 · medium
A solid mixture contains 0.010 mol of FeC2O4 and 0.010 mol of Fe2(C2O4)3. It is dissolved in dilute H2SO4 and titrated with 0.020 M KMnO4 (reduced to…JEE Advanced 2024 Paper 2 · medium
Paragraph 2: A 1.250 g sample containing impure CuSO4·5H2O (the impurities are inert and non-reacting) is dissolved in water and an excess of KI is…JEE Advanced 2024 Paper 2 · 2-question set

JEE Advanced 2022

White phosphorus reacts with hot aqueous NaOH: P4+3NaOH+3H2OrightarrowPH3+3NaH2PO2. In an experiment, 12.4 g of P4 (molar mass 124 g mol^-1) reacts…JEE Advanced 2022 Paper 2 · medium

JEE Advanced 2021

Paragraph 3: The copper content of a brass sample (an alloy of copper and zinc only) is determined by iodometry. First a sodium thiosulfate solution…JEE Advanced 2021 Paper 1 · 2-question set
Paragraph 2: A pale-green crystalline solid X dissolves readily in water. Its aqueous solution gives a deep-blue precipitate with K3[Fe(CN)6], and a…JEE Advanced 2021 Paper 2 · 2-question set
Chromite ore is roasted with sodium carbonate in air according to 4Fe(CrO2)2+8Na2CO3+7O2→ 2Fe2O3+8Na2CrO4+8CO2. The number of moles of electrons lost…JEE Advanced 2021 Paper 2 · medium

JEE Advanced 2020

A 0.500 g sample of pyrolusite ore is treated with 50.0 mL of 0.100 M oxalic acid in dilute sulphuric acid and warmed until all the MnO2 has reacted.…JEE Advanced 2020 Paper 1 · medium

JEE Advanced 2019

A 0.851 g mixture of ferrous oxalate FeC2O4 and ferric oxalate Fe2(C2O4)3 requires exactly 30.0 mL of 0.100 M KMnO4 for complete oxidation in acidic…JEE Advanced 2019 Paper 2 · hard

JEE Advanced 2017

A 0.100 mol mixture of FeC2O4 and Fe2(C2O4)3 is titrated in acidic solution with KMnO4 (which is reduced to Mn^2+) and requires exactly 0.0900 mol of…JEE Advanced 2017 Paper 1 · medium

JEE Advanced 2016

A solution is prepared by dissolving m g of CuSO4·5H2O (M=249.7 g mol^-1) in water and making the volume 500 mL. To 25.0 mL of it, excess KI is added…JEE Advanced 2016 Paper 1 · medium
Acidified KMnO4 and neutral KMnO4 are used as oxidants. Select the correct statement(s) about the stoichiometry of reactions of the permanganate ion…JEE Advanced 2016 Paper 2 · hard

Other Chemistry topics

Alcohols, Phenols, Ethers and Haloalkanes 11 Atomic Structure 9 Biomolecules and Polymers 8 Carbonyl Compounds, Carboxylic Acids and Amines 20 Chemical Bonding and Molecular Structure 17 Chemical Equilibrium 12 Chemical Kinetics 24 Chemical Thermodynamics 21 Coordination Compounds 23 Electrochemistry 22 General Organic Chemistry and Isomerism 37 Hydrocarbons 12 Ionic Equilibrium 20 Mole Concept and Stoichiometry 6 Qualitative and Practical Chemistry 7 Solutions, Solid State and Surface Chemistry 26 d- and f-Block Elements and Metallurgy 11 s-Block, p-Block Elements and Hydrogen 29