by DeepWebLabs
AP-EAPCET SERIES
Chemistry

Redox Reactions

24 previous year questions.

Volume: 24 Ques
Yield: High

High-Yield Trend

9
2025
2
2024
4
2023
9
2022

Chapter Questions
24 MCQs

01
PYQ 2022
medium
chemistry ID: ap-eapce
What are the oxidation states of the three Br atoms in the molecule ?
1
+5, +6, +5
2
+6, +4, +6
3
+7, +2, +7
4
+6, +3, +7
02
PYQ 2022
medium
chemistry ID: ap-eapce
In the reaction of phosphorous with conc. HNO3, the oxidized and reduced products respectively are
1
H3PO4, NO2
2
H3PO2, NO
3
H3PO3, N2O
4
HPO3, NO
03
PYQ 2022
medium
chemistry ID: ap-eapce
The energy conversion involved in a galvanic cell is
1
Chemical energy to mechanical energy
2
Chemical energy to electrical energy
3
Electrical energy to chemical energy
4
Electrical energy to thermal energy
04
PYQ 2022
medium
chemistry ID: ap-eapce
The element with the electronic configuration [Kr]4d 5s is
1
Ag
2
Pd
3
Rh
4
Tc
05
PYQ 2022
medium
chemistry ID: ap-eapce
Which of the following reactions is not a disproportionation reaction?
1
2
3
4
06
PYQ 2022
medium
chemistry ID: ap-eapce
What is the oxidation state of S in the sulphur containing product of the following reaction?
1
2
3
4
07
PYQ 2022
medium
chemistry ID: ap-eapce
What are the oxidation numbers of S atoms in ?
1
6, –1, –1.6
2
5, 0, 0, 5
3
2.5, 2.5, 2.5, 2.5
4
7, –2, –2, 7
08
PYQ 2022
medium
chemistry ID: ap-eapce
What are x and y in the following reaction?
1
2
3
4
09
PYQ 2022
medium
chemistry ID: ap-eapce
Which of the following is not a disproportionation reaction?
1
2
3
4
10
PYQ 2023
medium
chemistry ID: ap-eapce
In which of the following reactions is oxidized?
I. Photosynthesis
II.
III.
IV.
1
I, II
2
I, III
3
II, IV
4
III, IV
11
PYQ 2023
medium
chemistry ID: ap-eapce
In aqueous solutions, the strongest reducing agents in Group 1 and Group 2 elements of the periodic table respectively are
1
Li, Be
2
Cs, Ba
3
Li, Ba
4
Na, Mg
12
PYQ 2023
medium
chemistry ID: ap-eapce
What are x, y and z respectively in the following reaction?
1
14, 1, 6
2
14, 6, 1
3
6, 1, 14
4
6, 14, 1
13
PYQ 2023
medium
chemistry ID: ap-eapce
This equation represents the preparation of gold sol by
1
Oxidation
2
Reduction
3
Double decomposition
4
Hydrolysis
14
PYQ 2024
medium
chemistry ID: ap-eapce

Given below are two statements: Statement-I: In the decomposition of potassium chlorate, Cl is reduced.
Statement-II: Reaction of Na with to form is a redox reaction.

1

Both statements-I and II are correct

2

Both statements-I and II are not correct

3

Statement-I is correct but statement-II is not correct

4

Statement-I is not correct but statement-II is correct

15
PYQ 2024
medium
chemistry ID: ap-eapce
Which of the following occurs with KMnO in neutral medium?
1
Oxidation of oxalate ion
2
Precipitation of sulfur from hydrogen sulfide
3
Oxidation of Fe to Fe
4
Oxidation of iodide to iodate
16
PYQ 2025
medium
chemistry ID: ap-eapce

In acid medium dichromate oxidizes sulphite to sulphate as shown below. Identify correct statements about this balanced equation:
Statements:
I) Sum of and is (4)
II) Sum of and is equal to .
III) Sum of , , and is 11.

1
I, II, III
2
I, II only
3
I, III only
4
II, III only
17
PYQ 2025
medium
chemistry ID: ap-eapce
In which of the following reactions of H O , dioxygen is evolved? (only = O evolved)
I) With HOCl in acidic medium
II) With permanganate in acidic medium
III) With permanganate in basic medium
1
I& II only
2
I, II& III
3
II& III only
4
I& III only
18
PYQ 2025
medium
chemistry ID: ap-eapce
H O reduces KMnO in acidic medium to 'x' and in basic medium to 'y'. What are x and y?
1
x = MnO , y = Mn
2
x = Mn , y = MnO
3
x = MnO , y = Mn
4
x = MnO , y = MnO
19
PYQ 2025
medium
chemistry ID: ap-eapce
In acid medium, dichromate oxidizes sulphite to sulphate. In this redox reaction, the oxidation state of sulphur changes from to . What is the value of ?
1
8
2
6
3
10
4
12
20
PYQ 2025
medium
chemistry ID: ap-eapce
Alkaline oxidative fusion of MnO gives 'X'. The products formed when 'X' undergoes disproportionation in acid medium are
I) KMnO
II) MnO
III) O
IV) H O
1
I, II only
2
I, II, III, IV
3
I, II, III only
4
I, II, IV only
21
PYQ 2025
medium
chemistry ID: ap-eapce
In acidic medium oxidises to . How many moles of are oxidised by 10 moles of ?
1
20
2
10
3
25
4
15
22
PYQ 2025
medium
chemistry ID: ap-eapce
100 mL of aqueous solution of 0.05 M Cu is added to 1 L of 0.1 M KI solution. The resultant solution was titrated with 0.1 M Na S O solution using starch indicator until blue color disappeared. What is the volume (in mL) of Na S O used?
1
2000
2
1000
3
500
4
100
23
PYQ 2025
easy
chemistry ID: ap-eapce
In a redox titration, 25 mL of 0.1 M KMnO is required to completely react with oxalic acid in acidic medium. The volume of 0.2 M oxalic acid used is:
(Balanced reaction: )
1
25 mL
2
31.25 mL
3
12.5 mL
4
62.5 mL
24
PYQ 2025
medium
chemistry ID: ap-eapce
Which one of the following oxidizes manganous salt to permanganate in aqueous solution?
1

2

3

4

About Redox Reactions - AP-EAPCET

Redox Reactions is a vital chapter for AP-EAPCET aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.

By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.

Frequently Asked Questions

Why focus on Redox Reactions PYQs?

Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.

How to best use this analysis?

Review the topic breakdown to see which sub-topics within Redox Reactions carry the most weight. Then, tackle the questions iteratively to solidify your understanding.