Recommended PYQs (STRICTLY NCERT Based) Redox Reactions Chemistry (2022) NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Which reaction is NOT a redox reaction?

1.

2 {K C l O}_{3} + I_{2} \to 2 {K I O}_{3} + {C l}_{2}

$2 \mathrm{KClO}_3+\mathrm{I}_2 \rightarrow 2 \mathrm{KIO}_3+\mathrm{Cl}_2$
2.

H_{2} + {C l}_{2} \to 2 H C l

$\mathrm{H}_2+\mathrm{Cl}_2 \rightarrow 2 \mathrm{HCl}$
3.

{B a C l}_{2} + {N a}_{2} {S O}_{4} \to {B a S O}_{4} + 2 N a C l

$\mathrm{BaCl}_2+\mathrm{Na}_2 \mathrm{SO}_4 \rightarrow \mathrm{BaSO}_4+2 \mathrm{NaCl}$
4.

Z n + {C u S O}_{4} \to {Z n S O}_{4} + C u

$\mathrm{Zn}+\mathrm{CuSO}_4 \rightarrow \mathrm{ZnSO}_4+\mathrm{Cu}$

Subtopic: Introduction to Redox and Oxidation Number |

67%

From NCERT

NEET - 2024

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Q2:

Which of the following reaction is not a disproportionation reaction?

1.	$2 \mathrm{~F}_{2(g)}+2 \mathrm{OH}_{(a q)}^{-} \rightarrow 2 \mathrm{~F}_{(a q)}^{-}+\mathrm{OF}_{2(g)}+\mathrm{H}_2 \mathrm{O}_{(l)}$
2.	$\mathrm{Cl}_{2(g)}+2 \mathrm{OH}^{-}_{(a q)} \rightarrow \mathrm{ClO}_{(a q)}^{-}+\mathrm{Cl}_{(a q)}^{-}+\mathrm{H}_2 \mathrm{O}_{(l)}$
3.	$2 \mathrm{NO}_{2(g)}+2 \mathrm{OH}^{-}_{(\mathrm{aq})} \rightarrow \mathrm{NO}_{2(\mathrm{aq})}^{-}+\mathrm{NO}_{3(\mathrm{aq})}^{-}+\mathrm{H}_2 \mathrm{O}_{(l)}$
4.	$2 \mathrm{H}_2 \mathrm{O}_{2(aq)} \rightarrow 2 \mathrm{H}_2 \mathrm{O}_{(l)}+\mathrm{O}_{2(g)}$

Subtopic: Redox Titration & Type of Redox |

58%

From NCERT

NEET - 2024

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Q3:

Given the following reaction involving manganese
(

Mn

$\text{Mn}$ ):

3 M n O_{4}^{2 -} + 4 H^{+} \to 2 M n O_{4}^{-} + M n O_{2} + 2 H_{2} O

$\mathrm{3MnO^{2-}_4+4H^+\rightarrow 2MnO^{-}_4+MnO_{2}+2H_2O}$

Which oxidation states of manganese are not observed in the above reaction?
A. +6
B. +2
C. +4
D. +7
E. +3
Mark the most appropriate answer from the options given below:
1. D and E only
2. B and D only
3. A and B only
4. B and E only

Subtopic: Introduction to Redox and Oxidation Number |

81%

From NCERT

NEET - 2024

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Q4:

For the given redox reaction,

a {C r}_{2} O_{7}^{2 -} + {b S O}_{3}^{2 -} (a q) + c H^{+} (a q) \to

$\mathrm{{a} {Cr}_2 {O}_7^{2-}+{bSO}_3^{2-}({aq})+{c} {H}^{+}({aq})} →$

2 a {C r}^{3 +} (a q) + {b S O}_{4}^{2 -} (a q) + \frac{c}{2} H_{2} O (ℓ)

$\mathrm{2 {a} {Cr}^{3+}({aq})+{bSO}_4^{2-}({aq})+\frac{{c}}{2} {H}_2 {O}(\ell)}$
the coefficients a, b and c of a balanced equation are found to be, respectively:
1. 8, 1, 3
2. 1, 3, 8
3. 3, 8, 1
4. 1, 8, 3

Subtopic: Balancing of Equations |

77%

From NCERT

NEET - 2023

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Q5:

Identify the incorrect statement from the following:

1.	Lithium is the strongest reducing agent among the alkali metals.
2.	Alkali metals react with water to form their hydroxides.
3.	The oxidation number of K in KO₂ is +4.
4.	Ionisation enthalpy of alkali metals decreases from top to bottom in the group.

Subtopic: Introduction to Redox and Oxidation Number |

66%

From NCERT

NEET - 2022

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Q6:

At

298 K,

$298 {~K},$ the standard electrode potentials of

{C u}^{2 +} / C u,

$\mathrm{{Cu}^{2+} /{Cu},}$

{Z n}^{2 +} / Z n, {F e}^{2 +} / F e

$\mathrm{{Zn}^{2+} / {Zn},~~ {Fe}^{2+} / {Fe}}$ and

{A g}^{+} / A g

$\mathrm{{Ag}^{+} / {Ag}}$ are

0.34 V, - 0.76 V,

$\mathrm{0.34 {~V}, -0.76 {~V},}$

- 0.44 V

$\mathrm{-0.44 {~V}}$ and

0.80 V,

$\mathrm{0.80 {~V},}$ respectively.
On the basis of standard electrode potentials, predict which of the following reaction can not occur?

1.	$\mathrm{2 {CuSO}_{4}({aq})+2 {Ag}({s}) → 2 {Cu}({s})+{Ag}_{2} {SO}_{4}({aq})}$
2.	$\mathrm{{CuSO}_{4}({aq})+{Zn}({s})}$ $\mathrm{→ {ZnSO}_{4}({aq})+{Cu}({s})}$
3.	$\mathrm{{CuSO}_{4}({aq})+{Fe}({s})}$ $\mathrm{→ {FeSO}_{4}({aq})+{Cu}({s})}$
4.	$\mathrm{{FeSO}_{4}({aq})+{Zn}({s})}$ $→ \mathrm{{ZnSO}_{4}({aq})+{Fe}({s})}$

Subtopic: Emf & Electrode Potential |

69%

From NCERT

NEET - 2022

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Q7:

A set of species capable of showing disproportionation reactions is:

1.	$\mathrm{ClO^–_2, ~ClO^–_3,~ ClO^–_4, ~Cl_2}$
2.	$\mathrm{Cl_2, ~ClO^–_2, ~ClO^–_3, ~S_8}$
3.	$\mathrm{ClO^–_4, ~ClO^–, ~ClO^–_2, ~F_2}$
4.	$\mathrm{ClO^–_3, ~ClO^–_4, ~H_2O_2, ~ClO^–}$

Subtopic: Redox Titration & Type of Redox |

62%

From NCERT

NEET - 2022

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Q8:

Which of the following reactions is a decomposition redox reaction?

1.	$\mathrm{2 {Pb}\left({NO}_3\right)_2({s}) \rightarrow 2 {PbO}({s})+4 {NO}_2({g})+{O}_2({g})}$
2.	$\mathrm{{N}_2({g})+{O}_2({g}) \rightarrow 2 {NO}({g})}$
3.	$\small{\mathrm{{Cl}_2({g})+2 {OH}^{-}({aq}) \rightarrow {ClO}^{-}({aq})+{Cl}^{-}({aq})+4 {H}_2 {O}(\ell)}}$
4.	$\small{\mathrm{{P}_4({s})+3 {OH}^{-}({aq})+3 {H}_2 {O}(\ell) \rightarrow{PH}_3({g})+3 {H}_2 {PO}_2^{-}({aq})}}$

Subtopic: Redox Titration & Type of Redox |

72%

From NCERT

NEET - 2022

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Q9:

The correct example of metal displacement reaction among the following is:

1. $Fe + 2 HCl \to {FeCl}_{2} + H_{2} ↑$ $Fe + 2 HCl \to {FeCl}_{2} + H_{2} ↑$

2. $2 Pb {({NO}_{3})}_{2} \to 2 PbO + 4 {NO}_{2} + O_{2} ↑$ $2 Pb {({NO}_{3})}_{2} \to 2 PbO + 4 {NO}_{2} + O_{2} ↑$

3. $2 {KClO}_{3} \overset{∆}{\to} 2 KCl + 3 O_{2}$ $2 {KClO}_{3} \overset{∆}{\to} 2 KCl + 3 O_{2}$

4. ${Cr}_{2} O_{3} + 2 Al \overset{∆}{\to} {Al}_{2} O_{3} + 2 Cr$ ${Cr}_{2} O_{3} + 2 Al \overset{∆}{\to} {Al}_{2} O_{3} + 2 Cr$

Subtopic: Introduction to Redox and Oxidation Number |

70%

From NCERT

NEET - 2021

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Q10:

What is the alteration in the oxidation state of carbon in the given reaction?

$\mathrm{{CH_4}_{(g)} + 4{Cl_2}_{(g)} \rightarrow {CCl_4}_{(l)} + 4 HCl_{(g)}}$

1.	0 to +4	2.	–4 to +4
3.	0 to –4	4.	+4 to +4

Subtopic: Oxidizing & Reducing Agents |

83%

From NCERT

NEET - 2020

1

2

3

4

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions

Add Note

Highlight in NCERT

Add Note

Highlight in NCERT

Add Note

Highlight in NCERT

Add Note

Highlight in NCERT

Add Note

Highlight in NCERT

Add Note

Highlight in NCERT

Add Note

Highlight in NCERT

Add Note

Highlight in NCERT

Add Note

Highlight in NCERT

Add Note

Highlight in NCERT

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions