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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.

21Papers
20Years
24Questions
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.

Medium 14 58.3%
Easy 10 41.7%

Question type distribution

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

Multiple Choices 16 66.7%
Numerical Answer Type (NAT) 6 25%
Subjective 2 8.3%

Subject weightage

Top subjects by unique question coverage.

Chemistry
24 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
24 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Redox Reactions
24 Qs

Paper coverage

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

JEE ADVANCED 2025 PAPER 1 ONLINE
1 Qs
JEE ADVANCED 2021 PAPER 2 ONLINE
3 Qs
JEE ADVANCED 2020 PAPER 2 OFFLINE
1 Qs
JEE ADVANCED 2017 PAPER 2 OFFLINE
1 Qs
JEE ADVANCED 2016 PAPER 1 OFFLINE
1 Qs
JEE ADVANCED 2015 PAPER 1 OFFLINE
1 Qs
JEE ADVANCED 2014 PAPER 1 OFFLINE
2 Qs
IIT JEE 2011 PAPER 1 OFFLINE
1 Qs
IIT JEE 2011 PAPER 2 OFFLINE
1 Qs
IIT JEE 2001 SCREENING
1 Qs
IIT JEE 2000 SCREENING
1 Qs
IIT JEE 1999
1 Qs
IIT JEE 1997
1 Qs
IIT JEE 1995
1 Qs
IIT JEE 1992
1 Qs
IIT JEE 1991
1 Qs
IIT JEE 1990
1 Qs
IIT JEE 1988
1 Qs
IIT JEE 1982
1 Qs
IIT JEE 1981
1 Qs
IIT JEE 1980
1 Qs

Included previous year papers

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

PaperYear / sessionQuestions in this viewOpen
JEE ADVANCED 2025 PAPER 1 ONLINE20251View paper
JEE ADVANCED 2021 PAPER 2 ONLINE20213View paper
JEE ADVANCED 2020 PAPER 2 OFFLINE20201View paper
JEE ADVANCED 2017 PAPER 2 OFFLINE20171View paper
JEE ADVANCED 2016 PAPER 1 OFFLINE20161View paper
JEE ADVANCED 2015 PAPER 1 OFFLINE20151View paper
JEE ADVANCED 2014 PAPER 1 OFFLINE20142View paper
IIT JEE 2011 PAPER 1 OFFLINE20111View paper
IIT JEE 2011 PAPER 2 OFFLINE20111View paper
IIT JEE 2001 SCREENING20011View paper
IIT JEE 2000 SCREENING20001View paper
IIT JEE 199919991View paper
IIT JEE 199719971View paper
IIT JEE 199519951View paper
IIT JEE 199219921View paper
IIT JEE 199119911View paper
IIT JEE 199019901View paper
IIT JEE 198819881View paper
IIT JEE 198219821View paper
IIT JEE 198119811View paper
IIT JEE 198019801View paper

All Redox Reactions previous year questions

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

1
1980 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1980
M is molecular weight of KMnO4. The equivalent wight of KMnO4 when it is converted into K2MnO4 is
A
M
B
M/3
C
M/5
D
M/7
Open complete paper
2
1981 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1981
1 mole of N2H4 loses 10 moles of electrons to form a new compound Y. assuming that all nitrogen appears in the new compound , what is the oxidation state of nitrogen in Y ? (there is no change in the oxidation state of hydrogen)
A
-1
B
-3
C
+3
D
+5
Open complete paper
3
1982 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1982
The oxidation number of carbon in CH2O is
A
-2
B
+2
C
0
D
+4
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4
1988 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1988
The equivalent weight of MnSO4 is half of its molecular weight, when it converts to
A
Mn2O3
B
MnO2
C
\(MnO_4^ -\)
D
\(MnO_4^{2 - }\)
Open complete paper
5
1990 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1990
The oxidation number of phosphorus in Ba(H2PO2) is :
A
+3
B
+2
C
+1
D
-1
Open complete paper
6
1991 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1991
The volume strength of 1.5 N H2O2 solution is
A
4.8
B
8.4
C
3.0
D
8.0
Open complete paper
7
1992 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1992
For the redox reaction:
\(MnO_4^ - + {C_2}O_4^{ - 2} + {H^ + }\) \(\to M{n^{2 + }} + C{O_2} + {H_2}O\)
The correct coefficients of the reactants for the balanced reaction are
A
\(MnO_4^ - \,\, \to \,\,2,\,\,{C_2}O_4^{2 - }\, \to \,\,5,\,{H^ + } \to \,\,16\)
B
\(MnO_4^ - \,\, \to \,\,16,\,\,{C_2}O_4^{2 - }\, \to \,\,5,\,{H^ + } \to \,\,2\)
C
\(MnO_4^ - \,\, \to \,\,5,\,\,{C_2}O_4^{2 - }\, \to \,\,16,\,{H^ + } \to \,\,2\)
D
\(MnO_4^ - \,\, \to \,\,2,\,\,{C_2}O_4^{2 - }\, \to \,\,16,\,{H^ + } \to \,\,5\)
Open complete paper
8
1995 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1995
A 5.0 cm3 solution of H2O2 liberates 0.508 g of iodine from an acidified KI solution. Calculate the strength of H2O2 solution in terms of volume strength at STP.
Write your response
Open complete paper
9
1997 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1997
To a 25ml H2O2 solution, excess of acidified solution of potassium iodide was added. The iodine liberated required 20 ml of 0.3 N sodium thiosulphate solution. Calculate the volume strength of H2O2 solution.
Write your response
Open complete paper
10
1999 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 1999
The normality of 0.3 M phosphorus acid (H3PO3) is
A
0.1
B
0.9
C
0.3
D
0.6
Open complete paper
11
2000 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 2000 SCREENING
Amongst the following identify the species with an atom in +6 oxidation state
A
\(MnO_4^ -\)
B
\(Cr(CN)_6^{3 - }\)
C
\(NiF_6^{2 - }\)
D
\(Cr{O_2}C{l_2}\)
Open complete paper
12
2001 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 2001 SCREENING
The reaction, \(3Cl{O^ - }(aq)\)\(\to ClO_3^ - (aq) + 2C{l^ - }(aq)\) is an example of :
A
Oxidation reaction
B
Reduction reaction
C
Disproportionate reaction
D
Decomposition reaction
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13
2011 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 2011 PAPER 1 OFFLINE
The difference in the oxidation numbers of the two types of sulphur atoms in Na2S4O6 is
Enter a numerical response
Open complete paper
14
2011 · Chemistry · Physical Chemistry · Redox Reactions
IIT JEE 2011 PAPER 2 OFFLINE

Reduction of the metal centre in aqueous permanganate ion involves

A
3 electrons in neutral medium.
B
5 electrons in neutral medium.
C
3 electrons in alkaline medium.
D
5 electrons in acidic medium.
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15
2014 · Chemistry · Physical Chemistry · Redox Reactions
JEE ADVANCED 2014 PAPER 1 OFFLINE
Consider the following list of reagents, acidified K2Cr2O7, alkaline KMnO4, CuSO4, H2O2, Cl2, O3, FeCl3, HNO3 and Na2S2O3. The total number of reagents that can oxidise aqueous iodide to iodine is
Enter a numerical response
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16
2014 · Chemistry · Physical Chemistry · Redox Reactions
JEE ADVANCED 2014 PAPER 1 OFFLINE
For the reaction,

$${I^ - } + ClO_3^ - + {H_2}S{O_4} \to C{l^ - } + HSO_4^ - + {I_2}$$

the correct statement(s) in the balanced equation is/are
A
stoichiometric coefficient of HSO\(_4^ -\) is 6
B
iodide is oxidised
C
sulphur is reduced
D
H2O is one of the products
Open complete paper
17
2015 · Chemistry · Physical Chemistry · Redox Reactions
JEE ADVANCED 2015 PAPER 1 OFFLINE

Fe3+ is reduced to Fe2+ by using

A
H2O2 in presence of NaOH.
B
Na2O2 in water.
C
H2O2 in presence of H2SO4.
D
Na2O2 in presence of H2SO4.
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18
2016 · Chemistry · Physical Chemistry · Redox Reactions
JEE ADVANCED 2016 PAPER 1 OFFLINE
In neutral or faintly alkaline solution, 8 moles of permanganate anion quantitative oxidise thiosulphate anions to produce X moles of a sulphur containing product. The magnitude of X is....
Enter a numerical response
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19
2017 · Chemistry · Physical Chemistry · Redox Reactions
JEE ADVANCED 2017 PAPER 2 OFFLINE
The order of the oxidation state of the phosphorous atom in

\({H_3}P{O_2},{H_3}P{O_4},{H_3}P{O_3}\) and \({H_4}{P_2}{O_6}\) is
A
\({H_3}P{O_3} > {H_3}P{O_2} > {H_3}P{O_4} > {H_4}{P_2}{O_6}\)
B
\({H_3}P{O_4} > {H_3}P{O_2} > {H_3}P{O_3} > {H_4}{P_2}{O_6}\)
C
\({H_3}P{O_4} > {H_4}{P_2}{O_6} > {H_3}P{O_3} > {H_3}P{O_2}\)
D
\({H_3}P{O_2} > {H_3}P{O_3} > {H_4}{P_2}{O_6} > {H_3}P{O_4}\)
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20
2020 · Chemistry · Physical Chemistry · Redox Reactions
JEE ADVANCED 2020 PAPER 2 OFFLINE
Choose the correct statement(s) among the following :
A
SnCl2 . 2H2O is a reducing agent.
B
SnO2 reacts with KOH to form K2[Sn(OH)6].
C
A solution of PbCl2 in HCl contains Pb2+ and Cl\(-\) ions.
D
The reaction of Pb3O4 with hot dilute nitric acid to give PbO2 is a redox reaction.
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Showing 20 of 24 questions