Redox Reactions PYQs - Last 10 Years
MHT CET / Chemistry / Physical Chemistry / 78 recent questions
ChemistryPhysical Chemistry2017-2026
Practice 78 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.
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Chemistry / Physical Chemistry
2019-2026
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2022-2026
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2017-2026
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Last 10 Years Redox Reactions Questions
Showing 28 of 78 filtered questions.
1Redox Reactions
What is the oxidation state of carbon in \(\mathrm{CaC}_2\) and \(\mathrm{K}_2 \mathrm{C}_2 \mathrm{O}_4\) respectively?
MCQ+1 / -02023
2Redox Reactions
What is the number of moles of electrons gained by one mole oxidizing agent in following redox reaction?
\(\mathrm{Zn_{(s)}+2HCl_{(aq)}}\) \(\longrightarrow\) \(\mathrm{ZnCl_2+H_2}\)
\(\mathrm{Zn_{(s)}+2HCl_{(aq)}}\) \(\longrightarrow\) \(\mathrm{ZnCl_2+H_2}\)
MCQ+1 / -02023
3Redox Reactions
Which among the following species is reduced by tin easily?
MCQ+1 / -02023
4Redox Reactions
What is the change in oxidation number of selenium in the following redox reaction?
$$\mathrm{SeO}_{3(\text { (a) })}^{2-}+\mathrm{Cl}_{2(\mathrm{~g})}+2 \mathrm{OH}^{-} \longrightarrow \mathrm{SeO}_{4(\text { (a) })}^{2-}+2 \mathrm{Cl}_{(\...
$$\mathrm{SeO}_{3(\text { (a) })}^{2-}+\mathrm{Cl}_{2(\mathrm{~g})}+2 \mathrm{OH}^{-} \longrightarrow \mathrm{SeO}_{4(\text { (a) })}^{2-}+2 \mathrm{Cl}_{(\...
MCQ+1 / -02023
5Redox Reactions
Which from following elements exhibits usual tendency to undergo reduction?
MCQ+1 / -02023
6Redox Reactions
What is the change in oxidation number of \(\mathrm{Cr}\) in the following redox reaction?
$$3 \mathrm{H}_2 \mathrm{O}_{2(\mathrm{aq})}+\mathrm{Cr}_2 \mathrm{O}_{7 \text { (aq) }}^{2-}+8 \mathrm{H}_{(\mathrm{aq})}^{+} \longrightarrow 3 \mat...
$$3 \mathrm{H}_2 \mathrm{O}_{2(\mathrm{aq})}+\mathrm{Cr}_2 \mathrm{O}_{7 \text { (aq) }}^{2-}+8 \mathrm{H}_{(\mathrm{aq})}^{+} \longrightarrow 3 \mat...
MCQ+1 / -02023
7Redox Reactions
What is the oxidation number of sulfur in \(\mathrm{H}_2 \mathrm{SO}_5\) ?
MCQ+1 / -02023
8Redox Reactions
What is the value of \(x\) in order to balance following redox reaction?
\(\mathrm{Mn}_{(\mathrm{aq})}^{2+}+x \mathrm{ClO}_{3(\mathrm{aq})}^{-} \rightarrow \mathrm{MnO}_{2(\mathrm{~s})}+x \mathrm{ClO}_{2(\mathrm{aq})}\)
\(\mathrm{Mn}_{(\mathrm{aq})}^{2+}+x \mathrm{ClO}_{3(\mathrm{aq})}^{-} \rightarrow \mathrm{MnO}_{2(\mathrm{~s})}+x \mathrm{ClO}_{2(\mathrm{aq})}\)
MCQ+1 / -02023
9Redox Reactions
Identify the elements undergoing reduction and oxidation respectively in the following redox reaction.
$$3 \mathrm{H}_3 \mathrm{AsO}_{3(\mathrm{aq})}+\mathrm{BrO}_{3(\mathrm{aq})}^{-} \rightarrow \mathrm{Br}_{(\mathrm{aq})}^{-}+3 \mathrm{H}...
$$3 \mathrm{H}_3 \mathrm{AsO}_{3(\mathrm{aq})}+\mathrm{BrO}_{3(\mathrm{aq})}^{-} \rightarrow \mathrm{Br}_{(\mathrm{aq})}^{-}+3 \mathrm{H}...
MCQ+1 / -02023
10Redox Reactions
Which one of the following conversions does NOT involve either oxidation or reduction?
MCQ+1 / -02022
11Redox Reactions
What is the change in oxidation number of nitrogen in following conversion?
\(\mathrm{NO}_3^{-} \longrightarrow \mathrm{NO}_2\)
\(\mathrm{NO}_3^{-} \longrightarrow \mathrm{NO}_2\)
MCQ+1 / -02021
12Redox Reactions
Which of following is NOT a redox reaction?
MCQ+1 / -02021
13Redox Reactions
Which among the following reactions exhibits the reducing property of ozone?
MCQ+1 / -02021
14Redox Reactions
Identify reductant in following reaction.
\(\mathrm{H}_2 \mathrm{~S}+\mathrm{NO}_2 \rightarrow \mathrm{H}_2 \mathrm{O}+\mathrm{NO}+\mathrm{S}\)
\(\mathrm{H}_2 \mathrm{~S}+\mathrm{NO}_2 \rightarrow \mathrm{H}_2 \mathrm{O}+\mathrm{NO}+\mathrm{S}\)
MCQ+1 / -02021
15Redox Reactions
Identify reducing agent in following reaction
\(\mathrm{H}_2 \mathrm{O}_{2(\mathrm{ag})}+\mathrm{ClO}_{4(\mathrm{aq})}^{-} \rightarrow \mathrm{ClO}_{2(\mathrm{aq})}^{-}+\mathrm{O}_{2(\mathrm{g})}\)
\(\mathrm{H}_2 \mathrm{O}_{2(\mathrm{ag})}+\mathrm{ClO}_{4(\mathrm{aq})}^{-} \rightarrow \mathrm{ClO}_{2(\mathrm{aq})}^{-}+\mathrm{O}_{2(\mathrm{g})}\)
MCQ+1 / -02021
16Redox Reactions
Oxidation state of Cr in potassium dichromate is
MCQ+1 / -02021
17Redox Reactions
Identify reductant in following reaction.
\(\mathrm{{C_2}O_4^{2 - } + MnO_4^ - + {H^ + } \longrightarrow M{n^{2 + }} + C{O_2} + {H_2}O}\)
\(\mathrm{{C_2}O_4^{2 - } + MnO_4^ - + {H^ + } \longrightarrow M{n^{2 + }} + C{O_2} + {H_2}O}\)
MCQ+1 / -02021
18Redox Reactions
What is the value of '\(\mathrm{x}\)' in order to balance the following redox reaction by ion electron method? \(\quad \mathrm{x} \mathrm{H}_2 \mathrm{O}_2+\mathrm{ClO}_4 \rightarrow \mathrm{xO}_2+\mathrm{ClO}_2+2 \mathrm{H}_2 \mathrm{O}\)
MCQ+1 / -02021
19Redox Reactions
What is the oxidation number of Mn in MnO$^{2-}_4$ ion?
MCQ+1 / -02020
20Redox Reactions
What is the oxidation number of As in H\(_3\)AsO\(_3\) ?
MCQ+1 / -02020
21Redox Reactions
Which among the following is used as an oxidising agent to bleach wood pulp into white paper?
MCQ+1 / -02020
22Redox Reactions
Which of the following oxides can act both as an oxidising agent as well as reducing agent?
MCQ+1 / -02019
23Redox Reactions
In which among the following compounds, oxidation number of nitrogen is +5 ?
MCQ+1 / -02019
24Redox Reactions
Oxidation state of nitrogen in nitric oxide is
MCQ+1 / -02019
25Redox Reactions
$$\begin{aligned}
& \text { In the reaction, } \\
& \mathrm{MnO}_4^{-1}(a q)+\mathrm{Br}^{-1}(a q) \longrightarrow \mathrm{MnO}_2(s)+\mathrm{BrO}_3^{-1}(a q)
\end{aligned}$$
,the correct change in oxidation number of the species involved is
,the correct change in oxidation number of the species involved is
MCQ+1 / -02019
26Redox Reactions
The ionic charges of manganate and permanganate ion are respectively
MCQ+1 / -02019
27Redox Reactions
The oxidation state of sulphur in $\mathrm{H}_2 \mathrm{S}_2 \mathrm{O}_7$ is
MCQ+1 / -02019
28Redox Reactions
The oxidation number of sulphur in $\mathrm{S}_8$ molecule is
MCQ+1 / -02019