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Previous year question hub

Redox Reaction - Physical Chemistry - Chemistry Previous Year Questions

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

6Papers
6Years
10Questions
1Topics

Redox Reaction question pattern

Every graph below is calculated only from this selection.

Questions by year

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

Difficulty distribution

How the classified questions are distributed by difficulty.

Not classified 10 100%

Question type distribution

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

Multiple Choices 10 100%

Subject weightage

Top subjects by unique question coverage.

Chemistry
10 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
10 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Redox Reaction
10 Qs

Paper coverage

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

WB JEE 2025
2 Qs
WB JEE 2024
1 Qs
WB JEE 2023
1 Qs
WB JEE 2022
1 Qs
WB JEE 2021
2 Qs
WB JEE 2017
3 Qs

Included previous year papers

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

PaperYear / sessionQuestions in this viewOpen
WB JEE 202520252View paper
WB JEE 202420241View paper
WB JEE 202320231View paper
WB JEE 202220221View paper
WB JEE 202120212View paper
WB JEE 201720173View paper

All Redox Reaction previous year questions

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

1
2017 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2017
What will be the normality of the salt solution obtained by neutralising x mL y (N) HCl with y mL x(N) NaOH, and finally adding (x + y) mL distilled water
A
\({{2(x + y)} \over {xy}}N\)
B
\({{xy} \over {2(x + y)}}N\)
C
\(\left( {{{2xy} \over {x + y}}} \right)N\)
D
\(\left( {{{x + y} \over {xy}}} \right)N\)
Open complete paper
2
2017 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2017
0.126 g of an acid is needed to completely neutralise 20 mL 0.1 (N) NaOH solution. The equivalent weight of the acid is
A
53
B
40
C
45
D
63
Open complete paper
3
2017 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2017
You are supplied with 500 mL each of 2N HCl and 5N HCl. What is the maximum volume of 3M HCl that you can prepare using only these two solutions?
A
250 mL
B
500 mL
C
750 mL
D
1000 mL
Open complete paper
4
2021 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2021
A given amount of Fe2+ is oxidised by x mol of \(MnO_4^ -\) in acidic medium. The number of moles of \(C{r_2}O_7^{2 - }\) required to oxidise the same amount of Fe2+ in acidic medium is
A
x
B
0.83 x
C
2.0 x
D
1.2 x
Open complete paper
5
2021 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2021
N2H4 and H2O2 show similarity in
A
density
B
reducing nature
C
oxidising nature
D
hybridisation of central atoms
Open complete paper
6
2022 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2022

Oxidation states of Cr in K2Cr2O7 and CrO5 are respectively

A
+6, +5
B
+6, +10
C
+6, +6
D
None of these
Open complete paper
7
2023 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2023

The equivalent weight of KIO\(_3\) in the given reaction is (M = molecular mass):

$$\mathrm{2Cr{(OH)_3} + 4O{H^ - } + KI{O_3} \to 2CrO_4^{2 - } + 5{H_2}O + KI}$$

A
M
B
M/2
C
M/6
D
M/8
Open complete paper
8
2024 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2024

The equivalent weight of \(\mathrm{Na}_2 \mathrm{S}_2 \mathrm{O}_3(\mathrm{Gram}\) molecular weight \(=\mathrm{M})\) in the given reaction is

$$\mathrm{I}_2+2 \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3=2 \mathrm{NaI}+\mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6$$

A
\(\mathrm{M} / 2\)
B
\(\mathrm{M}\)
C
\(2 \mathrm{M}\)
D
\(\mathrm{M / 4}\)
Open complete paper
9
2025 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2025

What is the four-electron reduced form of $\mathrm{O}_2$ ?

A
Superoxide
B
Peroxide
C
Oxide
D
Ozone
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10
2025 · Chemistry · Physical Chemistry · Redox Reaction
WB JEE 2025

How many electrons are needed to reduce $\mathrm{N}_2$ to $\mathrm{NH}_3 ?$

A
3
B
4
C
5
D
6
Open complete paper