Redox Reactions PYQs - Last 10 Years
AP EAPCET / Chemistry / Physical Chemistry / 27 recent questions
ChemistryPhysical Chemistry2016-2025
Practice 27 AP EAPCET 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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Last 10 Years Redox Reactions Questions
Showing 27 of 27 filtered questions.
1Redox Reactions
$\mathrm{KMnO}_4$ oxidises hydrogen sulphide in acidic medium, The number of moles of $\mathrm{KMnO}_4$ which react with one mole of hydrogen sulphide is
MCQ+1 / -02025
2Redox Reactions
Identify the correct statements about the following stoichiometric equation.
\(a \mathrm{P}_4+b^{-} \mathrm{OH}+c \mathrm{H}_2 \mathrm{O} \longrightarrow d \mathrm{PH}_3+e \mathrm{H}_2 \mathrm{PO}_2^{-}\)
I. $a+b+c=5$
II. $b+c-e=3$
III. T...
\(a \mathrm{P}_4+b^{-} \mathrm{OH}+c \mathrm{H}_2 \mathrm{O} \longrightarrow d \mathrm{PH}_3+e \mathrm{H}_2 \mathrm{PO}_2^{-}\)
I. $a+b+c=5$
II. $b+c-e=3$
III. T...
MCQ+1 / -02025
3Redox Reactions
100 mL of aqueous solution of $0.05 \mathrm{M} \mathrm{Cu}^{2+}$ is added to 1 L of 0.1 M KI solution. The resultant solution was titrated with $0.01 \mathrm{M} \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3$ solution using starch indicator till ...
MCQ+1 / -02025
4Redox Reactions
Which one of the following reactions is not feasible?
MCQ+1 / -02025
5Redox Reactions
Which one of the following acts as autocatalyst during titration of $\mathrm{KMnO}_4$ and oxalic acid in presence of dilute $\mathrm{H}_2 \mathrm{SO}_4$ ?
MCQ+1 / -02025
6Redox Reactions
$\mathrm{H}_2 \mathrm{O}_2$ reduces $\mathrm{KMnO}_4$ in acidic medium to ' $x$ ' and in basic medium to ' $y$ '. What are $x$ and $y$ ?
MCQ+1 / -02025
7Redox Reactions
$\mathrm{H}_2 \mathrm{O}_2$ with $\mathrm{KMnO}_4$ in acidic medium gives a manganese compound ' $X$ ' and in basic medium gives another manganese compound ' $Y$ '. The oxidation state of manganese in $X$ and $Y$ respectively are
MCQ+1 / -02025
8Redox Reactions
The volume (in mL ) of 10 volume $\mathrm{H}_2 \mathrm{O}_2$ solution required to completely react with 200 mL of 0.4 M $\mathrm{KMnO}_4$ solution in acidic medium is
MCQ+1 / -02025
9Redox Reactions
Observe the following reactions
(i) $2 \mathrm{KClO}_3(s) \xrightarrow{\Delta} 2 \mathrm{KCl}(s)+3 \mathrm{O}_2(g)$
(ii) $2 \mathrm{H}_2 \mathrm{O}_2(a q) \xrightarrow{\Delta} 2 \mathrm{H}_2 \mathrm{O}(l)+\mathrm{O}_2(g)$
(iii) $\mathrm{AgN...
(i) $2 \mathrm{KClO}_3(s) \xrightarrow{\Delta} 2 \mathrm{KCl}(s)+3 \mathrm{O}_2(g)$
(ii) $2 \mathrm{H}_2 \mathrm{O}_2(a q) \xrightarrow{\Delta} 2 \mathrm{H}_2 \mathrm{O}(l)+\mathrm{O}_2(g)$
(iii) $\mathrm{AgN...
MCQ+1 / -02024
10Redox Reactions
Acidification of chromate gives ' $Z$ '. The oxidation state of chromium in ' $Z$ ' is
MCQ+1 / -02024
11Redox Reactions
100 mL of $0.1 \mathrm{M} \mathrm{Fe}^{2+}$ solution was titrated with $\frac{1}{60} \mathrm{M}$ $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ solution in acid medium. What is the volume (in L ) of $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ solution consumed ?
MCQ+1 / -02024
12Redox Reactions
Which of the following reactions of $\mathrm{KMnO}_4$ occurs in acidic medium ?
MCQ+1 / -02024
13Redox Reactions
In the reaction of sulphur with concentrated sulphuric acid, the oxidised product is $X$ and reduced product is $Y, X$ and $Y$ are respectively.
MCQ+1 / -02024
14Redox Reactions
Which of the following occurs with $\mathrm{KMnO}_4$ in neutral medium?
MCQ+1 / -02024
15Redox Reactions
Given below are two statements.
Statement I : In the decomposition of potassium chlorate Cl is reduced.
Statement II : Reaction of Na with $\mathrm{O}_2$ to form $\mathrm{Na}_2 \mathrm{O}$ is a redox reaction.
The correct answer is
Statement I : In the decomposition of potassium chlorate Cl is reduced.
Statement II : Reaction of Na with $\mathrm{O}_2$ to form $\mathrm{Na}_2 \mathrm{O}$ is a redox reaction.
The correct answer is
MCQ+1 / -02024
16Redox Reactions
In neutral medium potassium permanganate oxidises $I^{-}$to $X$.. Identify the $X$.
MCQ+1 / -02024
17Redox Reactions
Observe the following reaction,
\(\mathrm{Cl}_2(g)+2 \mathrm{OH}^{-}(a q) \longrightarrow \mathrm{ClO}^{-}(a q)+\mathrm{Cl}^{-}(a q)+\mathrm{H}_2 \mathrm{O}(l)\)
Identify the correct statements about this reaction,
[I.] $\mathrm{Cl}_2(g)$...
\(\mathrm{Cl}_2(g)+2 \mathrm{OH}^{-}(a q) \longrightarrow \mathrm{ClO}^{-}(a q)+\mathrm{Cl}^{-}(a q)+\mathrm{H}_2 \mathrm{O}(l)\)
Identify the correct statements about this reaction,
[I.] $\mathrm{Cl}_2(g)$...
MCQ+1 / -02023
18Redox Reactions
What are the oxidation numbers of S atoms in \(\mathrm{S}_4 \mathrm{O}_6^{2-}\) ?
MCQ+1 / -02022
19Redox Reactions
What are the oxidation states of three Br atoms in \(\mathrm{Br}_3 \mathrm{O}_8\) molecule?
MCQ+1 / -02022
20Redox Reactions
What is the oxidation state of S in the sulphur containing product of the following reaction?
\(\mathrm{SO}_3^{2-}(a q)+\mathrm{Br}_2(l)+\mathrm{H}_2 \mathrm{O} \longrightarrow\)
\(\mathrm{SO}_3^{2-}(a q)+\mathrm{Br}_2(l)+\mathrm{H}_2 \mathrm{O} \longrightarrow\)
MCQ+1 / -02022
21Redox Reactions
In the reaction of phosphorus with conc. \(\mathrm{HNO}_3\), the oxidised and reduced products respectively are
MCQ+1 / -02022
22Redox Reactions
How many grams of Mg is required to completely reduce \(100 \mathrm{~mL}, 0.1 \mathrm{~M} \mathrm{~NO}_3^{-}\) solution using the following reaction?
\(\mathrm{NO}_3^{-}+\mathrm{Mg} \longrightarrow \mathrm{Mg}^{2+}+\mathrm{NH}_3\)
\(\mathrm{NO}_3^{-}+\mathrm{Mg} \longrightarrow \mathrm{Mg}^{2+}+\mathrm{NH}_3\)
MCQ+1 / -02022
23Redox Reactions
Which among the following species does not show disproportionation reaction?
MCQ+1 / -02021
24Redox Reactions
Which of the following statement is incorrect?
MCQ+1 / -02021
25Redox Reactions
Which among the following species acts as a
self-indicator?
self-indicator?
MCQ+1 / -02021
26Redox Reactions
Assertion (A) The colour of old lead paintings can be restored by washing them with a dilute solution of \(\mathrm{H}_2 \mathrm{O}_2\).
Reason (R) Hydrogen peroxide reduces \(\mathrm{PbS}\) to \(\mathrm{Pb}\).
Reason (R) Hydrogen peroxide reduces \(\mathrm{PbS}\) to \(\mathrm{Pb}\).
MCQ+1 / -02021
27Redox Reactions
For the redox reaction
\(\mathrm{MnO}_4^{-}+\mathrm{C}_2 \mathrm{O}_4^{2-}+\mathrm{H}^{+} \longrightarrow \mathrm{Mn}^{2+}+\mathrm{CO}_2+\mathrm{H}_2 \mathrm{O}\),
the correct coefficients of the reactants for the balanced reaction are resp...
\(\mathrm{MnO}_4^{-}+\mathrm{C}_2 \mathrm{O}_4^{2-}+\mathrm{H}^{+} \longrightarrow \mathrm{Mn}^{2+}+\mathrm{CO}_2+\mathrm{H}_2 \mathrm{O}\),
the correct coefficients of the reactants for the balanced reaction are resp...
MCQ+1 / -02021