Redox Reactions PYQs - Last 5 Years
MHT CET / Chemistry / Physical Chemistry / 60 recent questions
ChemistryPhysical Chemistry2022-2026
Practice 60 MHT CET Chemistry questions from Redox Reactions. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
60
PYQs on Page
Chemistry / Physical Chemistry
2022-2026
Year Range
Based on indexed question metadata
60
Last 5 Years
2022-2026
60
Last 10 Years
2017-2026
Recent Year Trend
2022
2023
2024
2025
2026Latest year
202219 max PYQs/year2026
Question Types
60PYQs
MCQ100%
Difficulty Mix
#1 Unknown60
60 in last 5 years60 in last 10 years
Last 5 Years Redox Reactions Questions
Showing 50 of 60 filtered questions.
1Redox Reactions
What is the difference in oxidation number of nitrogen when nitric acid is converted into nitrous oxide ?
MCQ+1 / -02026
2Redox Reactions
What is the number of electrons gained by Cl atom when $n$ mole of $\text{ClO}_4^-$ is transformed into $n$ mole of $\text{ClO}_2^-$ ion?
MCQ+1 / -02026
3Redox Reactions
What is the oxidation number of Cl in $\text{HOClO}_2$?
MCQ+1 / -02026
4Redox Reactions
What is the oxidation state of Xe in $\text{XeOF}_4$?
MCQ+1 / -02026
5Redox Reactions
Identify change in oxidation state of oxidising agent in following redox reaction.$3\text{H}_3\text{AsO}_{3(aq)} + \text{BrO}_{3(aq)}^- \longrightarrow \text{Br}_{(aq)}^- + 3\text{H}_3\text{AsO}_{4(aq)}$
MCQ+1 / -02026
6Redox Reactions
What is the oxidation number of carbon in oxalic acid ?
MCQ+1 / -02026
7Redox Reactions
Which of the following reactions is NOT an example of redox reaction?
MCQ+1 / -02026
8Redox Reactions
Identify oxidation number of Sulphur respectively in $\text{SO}_2$ and $\text{SO}_4^{2-}$ .
MCQ+1 / -02026
9Redox Reactions
What is the oxidation number of oxygen in $\text{KO}_2$ ?
MCQ+1 / -02026
10Redox Reactions
Which of the following phenomena represents oxidation?
MCQ+1 / -02026
11Redox Reactions
What is oxidation state of chlorine in chlorous acid?
MCQ+1 / -02026
12Redox Reactions
For the following redox reaction, find the correct statement.$\text{Sn}^{2+} + 2\text{Fe}^{3+} \rightarrow \text{Sn}^{4+} + 2\text{Fe}^{2+}$
MCQ+1 / -02026
13Redox Reactions
Which of the following is NOT a redox reaction?
MCQ+1 / -02026
14Redox Reactions
What is oxidation state of oxygen in $\text{OF}_2$ and in $\text{KO}_2$ respectively?
MCQ+1 / -02026
15Redox Reactions
Find the oxidation number of Cl in $\text{ClO}_4^{-1}$
MCQ+1 / -02026
16Redox Reactions
In the equation, $\mathrm{BiO}_3^{-}+6 \mathrm{H}^{+}+x \mathrm{e}^{-} \rightarrow \mathrm{Bi}^{3+}+3 \mathrm{H}_2 \mathrm{O}$ What is the value of $x$ ?
MCQ+1 / -02025
17Redox Reactions
What is the oxidation number of carbon in methanal?
MCQ+1 / -02025
18Redox Reactions
What is the oxidation number of phosphorus in calcium phosphate?
MCQ+1 / -02025
19Redox Reactions
Which of the following species acts as an weakest reducing agent?
MCQ+1 / -02025
20Redox Reactions
What is the charge required to convert $2 \mathrm{~mol} \mathrm{KMnO}_4$ to $\mathrm{MnSO}_4$ ?
MCQ+1 / -02025
21Redox Reactions
What is oxidation number of sulphur in $\mathrm{SO}_3$ ?
MCQ+1 / -02025
22Redox Reactions
Identify correct statement for reaction stated below.
\(\mathrm{Ag}_2 \mathrm{O}+\mathrm{H}_2 \mathrm{O}+2 \mathrm{e}^{-} \longrightarrow 2 \mathrm{Ag}+2 \mathrm{OH}^{-}\)
\(\mathrm{Ag}_2 \mathrm{O}+\mathrm{H}_2 \mathrm{O}+2 \mathrm{e}^{-} \longrightarrow 2 \mathrm{Ag}+2 \mathrm{OH}^{-}\)
MCQ+1 / -02025
23Redox Reactions
For a reaction, $\mathrm{NH}_4 \mathrm{NO}_2 \longrightarrow \mathrm{~N}_2+2 \mathrm{H}_2 \mathrm{O}$. Which from following phenomena is true regarding nitrogen?
MCQ+1 / -02025
24Redox Reactions
What is the difference in oxidation number of Mn in $\mathrm{KMnO}_4$ and $\mathrm{MnO}_2$ ?
MCQ+1 / -02025
25Redox Reactions
Which of the following species acts as strongest oxidising agent?
MCQ+1 / -02025
26Redox Reactions
A compound of Xe and F is found to have atomic ratio $\mathrm{Xe}: \mathrm{F}$ as $0.4: 2.4$, Find the oxidation number of Xe ?
MCQ+1 / -02025
27Redox Reactions
If a reaction occurs in following two steps
i. $2 \mathrm{ClO}^{-} \longrightarrow \mathrm{ClO}_2^{-}$
ii. $\mathrm{ClO}_2^{-}+\mathrm{ClO}^{-} \longrightarrow \mathrm{ClO}_3^{-}+\mathrm{Cl}^{-}$
Find the reaction intermediate.
i. $2 \mathrm{ClO}^{-} \longrightarrow \mathrm{ClO}_2^{-}$
ii. $\mathrm{ClO}_2^{-}+\mathrm{ClO}^{-} \longrightarrow \mathrm{ClO}_3^{-}+\mathrm{Cl}^{-}$
Find the reaction intermediate.
MCQ+1 / -02025
28Redox Reactions
Which is NOT correct regarding stock notation?
MCQ+1 / -02025
29Redox Reactions
What is the number of electrons transferred considering Mn when $\mathrm{KMnO}_4$ is converted into $\mathrm{Mn}_2 \mathrm{O}_3$ ?
MCQ+1 / -02025
30Redox Reactions
Identify correct statement for the reaction.
\(\mathrm{I}_2+\mathrm{KClO}_3 \xrightarrow{\Delta} \mathrm{ICl}+\mathrm{KIO}_3\)
\(\mathrm{I}_2+\mathrm{KClO}_3 \xrightarrow{\Delta} \mathrm{ICl}+\mathrm{KIO}_3\)
MCQ+1 / -02025
31Redox Reactions
Which metal in following compounds is not present in fractional oxidation state?
MCQ+1 / -02025
32Redox Reactions
A compound contains atoms of $x, y$ and z elements. Oxidation numbers of $x, y$ and $z$ are +3 , +5 and -2 respectively. Identify the possible formula of this compound.
MCQ+1 / -02025
33Redox Reactions
What are the respective oxidation states of sulphur atoms numbered 1 to 4 in tetrathionate ion shown below?
MCQ+1 / -02025
34Redox Reactions
Which of the following is a redox reaction?
MCQ+1 / -02025
35Redox Reactions
What is the value of $x$ and $y$ in order to balance following redox reaction?
\(\mathrm{xCuO}+\mathrm{yNH}_3 \longrightarrow \mathrm{xCu}+\mathrm{N}_2+\mathrm{xH}_2 \mathrm{O}\)
\(\mathrm{xCuO}+\mathrm{yNH}_3 \longrightarrow \mathrm{xCu}+\mathrm{N}_2+\mathrm{xH}_2 \mathrm{O}\)
MCQ+1 / -02024
36Redox Reactions
Which of the following changes involves transfer of 5 electrons?
MCQ+1 / -02024
37Redox Reactions
Which compound from following contains iodine with highest oxidation number?
MCQ+1 / -02024
38Redox Reactions
What is the oxidation state of S in $\mathrm{SO}_4^{2-}$ ?
MCQ+1 / -02024
39Redox Reactions
Identify the element reduced in following reaction.
\(\mathrm{Cr}_2 \mathrm{O}_7^{2-}+14 \mathrm{H}^{+}+6 \mathrm{I}^{-} \longrightarrow 2 \mathrm{Cr}^{3+}+3 \mathrm{H}_2 \mathrm{O}+3 \mathrm{I}_2\)
\(\mathrm{Cr}_2 \mathrm{O}_7^{2-}+14 \mathrm{H}^{+}+6 \mathrm{I}^{-} \longrightarrow 2 \mathrm{Cr}^{3+}+3 \mathrm{H}_2 \mathrm{O}+3 \mathrm{I}_2\)
MCQ+1 / -02024
40Redox Reactions
In which of the following compounds chlorine has highest oxidation state?
MCQ+1 / -02024
41Redox Reactions
What is the oxidation number of underlined species in $\mathrm{PF}_6^{-}$and $\mathrm{V}_2 \mathrm{O}_7^{-4}$ ions respectively?
MCQ+1 / -02024
42Redox Reactions
What is the oxidation state of phosphorus in phosphate ion?
MCQ+1 / -02024
43Redox Reactions
What is the oxidation number of Mn in $\mathrm{MnO}_4^{-}$?
MCQ+1 / -02024
44Redox Reactions
Calculate the oxidation number of Cr in $\mathrm{CrO}_4^{2-}$ ion and $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ respectively.
MCQ+1 / -02024
45Redox Reactions
What is change in oxidation number of nitrogen when $\mathrm{NO}_3^{-}$is converted to $\mathrm{NH}_4^{+}$ion?
MCQ+1 / -02024
46Redox Reactions
What is oxidation number of S in $\mathrm{SO}_3^{2-}$ ?
MCQ+1 / -02024
47Redox Reactions
Identify the correct statement for following reaction.
\(3 \mathrm{Mg}+\mathrm{N}_2 \longrightarrow \mathrm{Mg}_3 \mathrm{~N}_2\)
\(3 \mathrm{Mg}+\mathrm{N}_2 \longrightarrow \mathrm{Mg}_3 \mathrm{~N}_2\)
MCQ+1 / -02024
48Redox Reactions
What is the oxidation number of carbon in $\mathrm{K}_2 \mathrm{C}_2 \mathrm{O}_4 ?$
MCQ+1 / -02024
49Redox Reactions
What is the oxidation state of iodine in $\mathrm{I}_2 \mathrm{Cl}_6$ ?
MCQ+1 / -02024
50Redox Reactions
What is the change in oxidation number of S in following reaction?
\(\mathrm{H}_2 \mathrm{~S}+\mathrm{NO}_3^{-} \longrightarrow \mathrm{H}_2 \mathrm{O}+\mathrm{NO}+\mathrm{S}\)
\(\mathrm{H}_2 \mathrm{~S}+\mathrm{NO}_3^{-} \longrightarrow \mathrm{H}_2 \mathrm{O}+\mathrm{NO}+\mathrm{S}\)
MCQ+1 / -02024