Redox Reactions JEE Main PYQs PDF, 2020–2026

Redox Reactions questions per year

in the free PDF asked, not in the PDFThe PDF only has questions we can print in full with a checked answer, so it holds 86 of the 87 asked.

Topic-wise weightage by year

How many Redox Reactions questions each topic had in every JEE Main year (all shifts), counting every question asked, including ones not in the PDF. Darker cells mean more questions.

Swipe the table sideways for older years.

Newest questions (2026)

All 8 JEE Main 2026 Redox Reactions questions in the free PDF, latest shift first.

1. JEE Main 2026 · 6 Apr · Shift 2 · Applications of Redox

   500 mL of $0.2{\mathrm{M}}{\mathrm{MnO}}_{4}^{{-}}$solution in basic medium when mixed with 500 mL of 1.5 M KI solution, oxidises iodide ions to liberate molecular iodine. This liberated iodine is then titrated with a standard $x{\mathrm{M}}$ thiosulphate solution in presence of starch till the end point. If 300 mL of thiosulphate was consumed, then the value of $x$ is $\_\_\_\_$。

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2. JEE Main 2026 · 4 Apr · Shift 1 · Applications of Redox

   In order to oxidise a mixture of 1 mole each of ${\mathrm{FeC}}_{2}{\mathrm{O}}_{4},{\mathrm{Fe}}_{2}{({\mathrm{C}}_{2}{\mathrm{O}}_{4})}_{3},{\mathrm{FeSO}}_{4}$ and ${\mathrm{Fe}}_{2}{({\mathrm{SO}}_{4})}_{3}$ in acidic medium, the number of moles of ${\mathrm{KMnO}}_{4}$ required is

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3. JEE Main 2026 · 2 Apr · Shift 1 · Types of Redox Reactions

   Given below are two statements:

   Statement (I): Oxidising power of halogens decreases in the order $F_{2}>Cl_{2}>Br_{2}>I_{2}$, which is the basis of "Layer test".

   Statement (II): "Layer test" to identify $Br_{2}$ and $I_{2}$ in aqueous solution involves the oxidation of bromide or iodide into $Br_{2}$ or $I_{2}$ respectively with $Cl_{2}$, which is a type of displacement redox reaction.

   In the light of the above statements, choose the correct answer from the options given below:

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4. JEE Main 2026 · 28 Jan · Shift 1 · Applications of Redox

   500 mL of 1.2 M KI solution is mixed with 500 mL of $0.2{\mathrm{M}}{\mathrm{KMnO}}_{4}$ solution in basic medium. The liberated iodine was titrated with standard $0.1{\mathrm{M}}{\mathrm{Na}}_{2}{\ \mathrm{S}}_{2}{\mathrm{O}}_{3}$ solution in the presence of starch indicator till the blue color disappeared. The volume (in L ) of ${\mathrm{Na}}_{2}{\ \mathrm{S}}_{2}{\mathrm{O}}_{3}$ consumed is $\_\_\_\_$ . (Nearest integer)

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5. JEE Main 2026 · 24 Jan · Shift 1 · Oxidation and Reduction

   X and Y are the number of electrons involved, respectively during the oxidation of ${\mathrm{I}}^{{-}}$to ${\mathrm{I}}_{2}$ and ${\mathrm{S}}^{{2-}}$ to S by acidified ${\mathrm{K}}_{2}{\mathrm{Cr}}_{2}{\mathrm{O}}_{7}$. The value of ${\mathrm{X}}+{\mathrm{Y}}$ is $\_\_\_\_$ .

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6. JEE Main 2026 · 24 Jan · Shift 2 · Types of Redox Reactions

   One mole of ${\mathrm{Cl}}_{2}({\ \mathrm{g}})$ was passed into 2 L of cold 2 M KOH solution. After the reaction, the concentrations of ${\mathrm{Cl}}^{{-}},{\mathrm{ClO}}^{{-}}$and ${\mathrm{OH}}^{{-}}$are respectively (assume volume remains constant)

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7. JEE Main 2026 · 23 Jan · Shift 2 · Oxidation Number

   The oxidation state of chromium in the final product formed in the reaction between KI and acidified ${\mathrm{K}}_{2}{\mathrm{Cr}}_{2}{\mathrm{O}}_{7}$ solution is :

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8. JEE Main 2026 · 23 Jan · Shift 2 · Applications of Redox

   200 cc of $x\times {10}^{{-3}}{\mathrm{M}}$ potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr's salt solution in acidic medium.

   Here $x=$ $\_\_\_\_$ .

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