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Previous year question hub

Redox Reactions - Physical Chemistry - Chemistry Previous Year Questions

Practice Redox Reactions - Physical Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

63Papers
14Years
74Questions
1Topics

Redox Reactions question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Redox Reactions. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 45 60.8%
Medium 29 39.2%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Multiple Choices 45 60.8%
Numerical Answer Type (NAT) 29 39.2%

Subject weightage

Top subjects by unique question coverage.

Chemistry
74 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
74 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Redox Reactions
74 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

JEE MAIN 2026 ONLINE 23RD JANUARY EVENING SHIFT
2 Qs
JEE Main 2026 (Online) 2nd April Morning Shift
1 Qs
JEE Main 2026 (Online) 4th April Morning Shift
1 Qs
JEE Main 2026 (Online) 6th April Evening Shift
1 Qs
JEE MAIN 2026 ONLINE 24TH JANUARY EVENING SHIFT
1 Qs
JEE MAIN 2026 ONLINE 24TH JANUARY MORNING SHIFT
1 Qs
JEE MAIN 2026 ONLINE 28TH JANUARY MORNING SHIFT
1 Qs
JEE MAIN 2025 ONLINE 28TH JANUARY MORNING SHIFT
3 Qs
JEE MAIN 2025 ONLINE 22ND JANUARY EVENING SHIFT
1 Qs
JEE MAIN 2025 ONLINE 22ND JANUARY MORNING SHIFT
1 Qs
JEE MAIN 2025 ONLINE 29TH JANUARY EVENING SHIFT
1 Qs
JEE MAIN 2025 ONLINE 4TH APRIL MORNING SHIFT
1 Qs
JEE MAIN 2024 ONLINE 1ST FEBRUARY MORNING SHIFT
2 Qs
JEE MAIN 2024 ONLINE 29TH JANUARY MORNING SHIFT
2 Qs
JEE MAIN 2024 ONLINE 31ST JANUARY EVENING SHIFT
2 Qs
JEE MAIN 2024 ONLINE 6TH APRIL EVENING SHIFT
2 Qs
JEE MAIN 2024 ONLINE 27TH JANUARY EVENING SHIFT
1 Qs
JEE MAIN 2024 ONLINE 29TH JANUARY EVENING SHIFT
1 Qs
JEE MAIN 2024 ONLINE 30TH JANUARY EVENING SHIFT
1 Qs
JEE MAIN 2024 ONLINE 30TH JANUARY MORNING SHIFT
1 Qs
JEE MAIN 2024 ONLINE 4TH APRIL EVENING SHIFT
1 Qs
JEE MAIN 2024 ONLINE 4TH APRIL MORNING SHIFT
1 Qs
JEE MAIN 2024 ONLINE 8TH APRIL MORNING SHIFT
1 Qs
JEE MAIN 2023 ONLINE 6TH APRIL MORNING SHIFT
2 Qs
JEE MAIN 2023 ONLINE 8TH APRIL EVENING SHIFT
2 Qs
JEE MAIN 2023 ONLINE 10TH APRIL EVENING SHIFT
1 Qs
JEE MAIN 2023 ONLINE 13TH APRIL EVENING SHIFT
1 Qs
JEE MAIN 2023 ONLINE 1ST FEBRUARY MORNING SHIFT
1 Qs
JEE MAIN 2023 ONLINE 25TH JANUARY MORNING SHIFT
1 Qs
JEE MAIN 2023 ONLINE 31ST JANUARY MORNING SHIFT
1 Qs
JEE MAIN 2023 ONLINE 8TH APRIL MORNING SHIFT
1 Qs
JEE MAIN 2022 ONLINE 26TH JULY EVENING SHIFT
2 Qs
JEE MAIN 2022 ONLINE 25TH JUNE EVENING SHIFT
1 Qs
JEE MAIN 2022 ONLINE 26TH JULY MORNING SHIFT
1 Qs
JEE MAIN 2022 ONLINE 26TH JUNE EVENING SHIFT
1 Qs
JEE MAIN 2022 ONLINE 27TH JULY EVENING SHIFT
1 Qs
JEE MAIN 2022 ONLINE 28TH JUNE EVENING SHIFT
1 Qs
JEE MAIN 2022 ONLINE 29TH JULY EVENING SHIFT
1 Qs
JEE Main 2021 (Online) 25th February Morning Shift
1 Qs
JEE Main 2021 (Online) 26th February Morning Shift
1 Qs
JEE MAIN 2021 ONLINE 16TH MARCH EVENING SHIFT
1 Qs
JEE MAIN 2021 ONLINE 18TH MARCH EVENING SHIFT
1 Qs
JEE MAIN 2021 ONLINE 25TH JULY EVENING SHIFT
1 Qs
JEE MAIN 2021 ONLINE 27TH JULY EVENING SHIFT
1 Qs
JEE MAIN 2021 ONLINE 27TH JULY MORNING SHIFT
1 Qs
JEE MAIN 2020 ONLINE 2ND SEPTEMBER EVENING SLOT
1 Qs
JEE MAIN 2020 ONLINE 2ND SEPTEMBER MORNING SLOT
1 Qs
JEE MAIN 2020 ONLINE 4TH SEPTEMBER EVENING SLOT
1 Qs
JEE MAIN 2020 ONLINE 5TH SEPTEMBER EVENING SLOT
1 Qs
JEE MAIN 2020 ONLINE 7TH JANUARY EVENING SLOT
1 Qs
JEE MAIN 2020 ONLINE 7TH JANUARY MORNING SLOT
1 Qs
JEE MAIN 2020 ONLINE 9TH JANUARY MORNING SLOT
1 Qs
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
2 Qs
JEE MAIN 2019 ONLINE 10TH JANUARY EVENING SLOT
1 Qs
JEE MAIN 2019 ONLINE 12TH APRIL MORNING SLOT
1 Qs
JEE MAIN 2019 ONLINE 8TH APRIL MORNING SLOT
1 Qs
JEE MAIN 2019 ONLINE 9TH APRIL MORNING SLOT
1 Qs
JEE MAIN 2017 OFFLINE
1 Qs
JEE MAIN 2016 ONLINE 10TH APRIL MORNING SLOT
1 Qs
JEE MAIN 2014 OFFLINE
1 Qs
JEE MAIN 2013 OFFLINE
1 Qs
AIEEE 2006
1 Qs
AIEEE 2002
1 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
JEE Main 2026 (Online) 2nd April Morning Shift20261View paper
JEE Main 2026 (Online) 4th April Morning Shift20261View paper
JEE Main 2026 (Online) 6th April Evening Shift20261View paper
JEE MAIN 2026 ONLINE 23RD JANUARY EVENING SHIFT20262View paper
JEE MAIN 2026 ONLINE 24TH JANUARY EVENING SHIFT20261View paper
JEE MAIN 2026 ONLINE 24TH JANUARY MORNING SHIFT20261View paper
JEE MAIN 2026 ONLINE 28TH JANUARY MORNING SHIFT20261View paper
JEE MAIN 2025 ONLINE 22ND JANUARY EVENING SHIFT20251View paper
JEE MAIN 2025 ONLINE 22ND JANUARY MORNING SHIFT20251View paper
JEE MAIN 2025 ONLINE 28TH JANUARY MORNING SHIFT20253View paper
JEE MAIN 2025 ONLINE 29TH JANUARY EVENING SHIFT20251View paper
JEE MAIN 2025 ONLINE 4TH APRIL MORNING SHIFT20251View paper
JEE MAIN 2024 ONLINE 1ST FEBRUARY MORNING SHIFT20242View paper
JEE MAIN 2024 ONLINE 27TH JANUARY EVENING SHIFT20241View paper
JEE MAIN 2024 ONLINE 29TH JANUARY EVENING SHIFT20241View paper
JEE MAIN 2024 ONLINE 29TH JANUARY MORNING SHIFT20242View paper
JEE MAIN 2024 ONLINE 30TH JANUARY EVENING SHIFT20241View paper
JEE MAIN 2024 ONLINE 30TH JANUARY MORNING SHIFT20241View paper
JEE MAIN 2024 ONLINE 31ST JANUARY EVENING SHIFT20242View paper
JEE MAIN 2024 ONLINE 4TH APRIL EVENING SHIFT20241View paper
JEE MAIN 2024 ONLINE 4TH APRIL MORNING SHIFT20241View paper
JEE MAIN 2024 ONLINE 6TH APRIL EVENING SHIFT20242View paper
JEE MAIN 2024 ONLINE 8TH APRIL MORNING SHIFT20241View paper
JEE MAIN 2023 ONLINE 10TH APRIL EVENING SHIFT20231View paper
JEE MAIN 2023 ONLINE 13TH APRIL EVENING SHIFT20231View paper
JEE MAIN 2023 ONLINE 1ST FEBRUARY MORNING SHIFT20231View paper
JEE MAIN 2023 ONLINE 25TH JANUARY MORNING SHIFT20231View paper
JEE MAIN 2023 ONLINE 31ST JANUARY MORNING SHIFT20231View paper
JEE MAIN 2023 ONLINE 6TH APRIL MORNING SHIFT20232View paper
JEE MAIN 2023 ONLINE 8TH APRIL EVENING SHIFT20232View paper
JEE MAIN 2023 ONLINE 8TH APRIL MORNING SHIFT20231View paper
JEE MAIN 2022 ONLINE 25TH JUNE EVENING SHIFT20221View paper
JEE MAIN 2022 ONLINE 26TH JULY EVENING SHIFT20222View paper
JEE MAIN 2022 ONLINE 26TH JULY MORNING SHIFT20221View paper
JEE MAIN 2022 ONLINE 26TH JUNE EVENING SHIFT20221View paper
JEE MAIN 2022 ONLINE 27TH JULY EVENING SHIFT20221View paper
JEE MAIN 2022 ONLINE 28TH JUNE EVENING SHIFT20221View paper
JEE MAIN 2022 ONLINE 29TH JULY EVENING SHIFT20221View paper
JEE Main 2021 (Online) 25th February Morning Shift20211View paper
JEE Main 2021 (Online) 26th February Morning Shift20211View paper
JEE MAIN 2021 ONLINE 16TH MARCH EVENING SHIFT20211View paper
JEE MAIN 2021 ONLINE 18TH MARCH EVENING SHIFT20211View paper
JEE MAIN 2021 ONLINE 25TH JULY EVENING SHIFT20211View paper
JEE MAIN 2021 ONLINE 27TH JULY EVENING SHIFT20211View paper
JEE MAIN 2021 ONLINE 27TH JULY MORNING SHIFT20211View paper
JEE MAIN 2020 ONLINE 2ND SEPTEMBER EVENING SLOT20201View paper
JEE MAIN 2020 ONLINE 2ND SEPTEMBER MORNING SLOT20201View paper
JEE MAIN 2020 ONLINE 4TH SEPTEMBER EVENING SLOT20201View paper
JEE MAIN 2020 ONLINE 5TH SEPTEMBER EVENING SLOT20201View paper
JEE MAIN 2020 ONLINE 7TH JANUARY EVENING SLOT20201View paper
JEE MAIN 2020 ONLINE 7TH JANUARY MORNING SLOT20201View paper
JEE MAIN 2020 ONLINE 9TH JANUARY MORNING SLOT20201View paper
JEE MAIN 2019 ONLINE 10TH JANUARY EVENING SLOT20191View paper
JEE MAIN 2019 ONLINE 12TH APRIL MORNING SLOT20191View paper
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT20192View paper
JEE MAIN 2019 ONLINE 8TH APRIL MORNING SLOT20191View paper
JEE MAIN 2019 ONLINE 9TH APRIL MORNING SLOT20191View paper
JEE MAIN 2017 OFFLINE20171View paper
JEE MAIN 2016 ONLINE 10TH APRIL MORNING SLOT20161View paper
JEE MAIN 2014 OFFLINE20141View paper
JEE MAIN 2013 OFFLINE20131View paper
AIEEE 200620061View paper
AIEEE 200220021View paper

All Redox Reactions previous year questions

Practice every matching question in batches of 20, with every available option.

1
2002 · Chemistry · Physical Chemistry · Redox Reactions
AIEEE 2002
Which of the following is a redox reaction ?
A
NaCl + KNO3 \(\to\) NaNO3 + KCl
B
CaC2O4 + 2HCl \(\to\) CaCl2 + H2C2O4
C
Mg(OH)2 + 2NH4Cl \(\to\) MgCl2 + 2NH4OH
D
Zn + 2AgCN \(\to\) 2Ag+ Zn(CN)2
Open complete paper
2
2006 · Chemistry · Physical Chemistry · Redox Reactions
AIEEE 2006
Which of the following chemical reactions depicts the oxidizing behaviour of H2SO4?
A
NaCl + H2SO4 \(\to\) NaHSO4 + HCl
B
2PCl5 + H2SO4 \(\to\) 2POCl3 + 2HCl + SO2Cl2
C
2HI + H2SO4 \(\to\) I2 + SO2 + 2H2O
D
Ca(OH)2 + H2SO4 \(\to\) CaSO4 + 2H2O
Open complete paper
3
2013 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2013 OFFLINE
Consider the following reaction:

\(xMnO_4^- + yC_2O_4^{2-}\) + zH+ \(\to\) xMn2+ + 2yCO2 + \({z \over 2}{H_2}O\)

The value's of x, y and z in the reaction are, respectively :
A
5, 2 and 16
B
2, 5 and 8
C
2, 5 and 16
D
5, 2 and 8
Open complete paper
4
2014 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2014 OFFLINE
In which of the following reactions H2O2 acts as a reducing agent?
1. H2O2 + 2H+ + 2e- \(\to\) 2H2O
2. H2O2 - 2e- \(\to\) O2 + 2H+
3. H2O2 + 2e- \(\to\) 2OH-
4. H2O2 + 2OH- - 2e- \(\to\) O2 + 2H2O
A
1, 2
B
3, 4
C
1, 3
D
2, 4
Open complete paper
5
2016 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2016 ONLINE 10TH APRIL MORNING SLOT
The volume of 0.1N dibasic acid sufficient to neutralize 1 g of a base that furnishes 0.04 mole of OH− in aqueous solution is :
A
200 mL
B
400 mL
C
600 mL
D
800 mL
Open complete paper
6
2017 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2017 OFFLINE
Which of the following reactions is an example of a redox reaction?
A
\(Xe{F_6}\) + H2O \(\to\) \(XeO{F_4}\) + 2HF
B
\(Xe{F_6}\) + 2H2O \(\to\) \(XeO_2{F_2}\) + 4HF
C
\(Xe{F_4}\) + O2F2 \(\to\) \(Xe{F_6}\) + O2
D
\(Xe{F_2}\) + PF5 \(\to\) \({\left[ {XeF} \right]^ + }PF_6^ -\)
Open complete paper
7
2019 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2019 ONLINE 10TH JANUARY EVENING SLOT
In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of CO2 is :
A
10
B
2
C
1
D
5
Open complete paper
8
2019 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2019 ONLINE 12TH APRIL MORNING SLOT
An example of a disproportionation reaction is :
A
2NaBr + Cl2 \(\to\) 2NaCl + Br2
B
2KMnO4 \(\to\) 2KMnO4 + MnO2 + O2 (3) (4)
C
2CuBr \(\to\) CuBr2 + Cu
D
2MnO4 + 10I– + 16H+ \(\to\) 2Mn2+ + 5I2 + 8H2O
Open complete paper
9
2019 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
The hardness of a water sample (in terms of equivalents of CaCO3) containing 10–3 M CaSO4 is (Molar mass of CaSO4 = 136 g mol–1)
A
90 ppm
B
100 ppm
C
50 ppm
D
10 ppm
Open complete paper
10
2019 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount of NaOH in 50 mL of the given sodium hydroxide solution is -
A
20 g
B
4 g
C
80 g
D
10 g
Open complete paper
11
2019 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2019 ONLINE 8TH APRIL MORNING SLOT
In order to oxidise a mixture of one mole of each of FeC2O4, Fe2(C2O4)3, FeSO4 and Fe2(SO4)3 in acidic medium, the number of moles of KMnO4 required is :
A
1.5
B
3
C
2
D
1
Open complete paper
12
2019 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2019 ONLINE 9TH APRIL MORNING SLOT
The correct order of the oxidation states of nitrogen in NO, N2O, NO2 and N2O3 is :
A
NO2 < NO < N2O3 < N2O
B
NO2 < N2O3 < NO < N2O
C
N2O < NO < N2O3 < NO2
D
N2O < N2O3 < NO < NO2
Open complete paper
13
2020 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2020 ONLINE 2ND SEPTEMBER EVENING SLOT
The oxidation states of transition metal atoms in K2Cr2O7, KMnO4 and K2FeO4, respectively, are x, y and z. The sum of x, y and z is _______.
Enter a numerical response
Open complete paper
14
2020 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2020 ONLINE 2ND SEPTEMBER MORNING SLOT
While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?
A
Pipette and distilled water
B
Clamp and phenolphthalein
C
Burette and porcelain tile
D
Bunsen burner and measuring cylinder
Open complete paper
15
2020 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2020 ONLINE 4TH SEPTEMBER EVENING SLOT
A 100 mL solution was made by adding 1.43 g of Na2CO3.xH2O. The normality of the solution is 0.1 N. The value of x is _____.

(The atomic mass of Na is 23 g/mol)
Enter a numerical response
Open complete paper
16
2020 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2020 ONLINE 5TH SEPTEMBER EVENING SLOT
The volume, in mL, of 0.02 M K2Cr2O7 solution required to react with 0.288 g of ferrous oxalate in acidic medium is _______.
(Molar mass of Fe = 56 g mol–1)
Enter a numerical response
Open complete paper
17
2020 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2020 ONLINE 7TH JANUARY EVENING SLOT
The redox reaction among the following is :
A
reaction of H2SO4 with NaOH.
B
formation of ozone form atmosphere oxygen in the presence of sunlight.
C
combination of dinitrogen with dioxygen at 2000 K
D
reaction of [Co(H2O)6]Cl3 With AgNO3
Open complete paper
18
2020 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2020 ONLINE 7TH JANUARY MORNING SLOT
Oxidation number of potassium in K2O. K2O2 and KO2 respectively is :
A
+1, +2 and + 4
B
+1, +1 and + 1
C
+2, +1 and \(+ {1 \over 2}\)
D
+1, +4, and +2
Open complete paper
19
2020 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2020 ONLINE 9TH JANUARY MORNING SLOT
The compound that cannot act both as oxidising and reducing agent is :
A
H3PO4
B
H2SO3
C
H2O2
D
HNO2
Open complete paper
20
2021 · Chemistry · Physical Chemistry · Redox Reactions
JEE MAIN 2021 ONLINE 16TH MARCH EVENING SHIFT
Statement I : Sodium hydride can be used as an oxidising agent.

Statement II : The lone pair of electrons on nitrogen in pyridine makes it basic.

Choose the CORRECT answer from the options given below :
A
Statement I is false but statement II is true
B
Both statement I and statement II are true
C
Statement I is true but statement II is false
D
Both statement I and statement II are false
Open complete paper

Showing 20 of 74 questions