For the redox reaction,
 aMnO4-+bC2O42-+cH+dMn2++eCO2+fH2O
the correct stoichiometric coefficients of the reactants a, b, and c respectively for the balanced equation are: 

1. 16, 5, 2
2. 2, 5, 16
3. 2, 16, 5
4. 5, 16, 2

Subtopic:  Balancing of Equations |
 79%
From NCERT
NEET - 2018
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

The change in oxidation number of chlorine when Cl2 gas reacts with hot and concentrated sodium hydroxide solution is:

1. Zero to +1 and Zero to –5

2. Zero to –1 and Zero to +5

3. Zero to –1 and Zero to +3

4. Zero to +1 and Zero to –3

Subtopic:  Oxidizing & Reducing Agents |
 69%
From NCERT
AIPMT - 2012
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The reaction that does not represent auto redox or disproportionation is: 

1. Cl2+OH-Cl-+ClO3-+H2O

2. 2H2O2H2O+O2

3. 2Cu+Cu2++Cu

4. NH42Cr2O7N2+Cr2O3+4H2O

Subtopic:  Introduction to Redox and Oxidation Number |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Balance the following equation and choose the quantity that is the sum of the coefficients of reactants and products :

...PtCl4+...XeF2PtF6+....ClF+...Xe

1. 16

2. 13

3. 18

4. 12

Subtopic:  Balancing of Equations |
 69%
From NCERT
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

The standard electrode potential (E°) values of  Al3+/ Al,  Ag+ / Ag, K+ / K,  and Cr3+ / Cr are –1.66 V, 0.80 V, –2.93 V, & –0.79 V respectively. The correct decreasing order of the reducing power of the metal is:

1. Ag > Cr > Al > K 2. K > Al > Cr > Ag
3. K > Al > Ag > Cr 4. Al > K > Ag > Cr
Subtopic:  Emf & Electrode Potential |
 73%
From NCERT
NEET - 2019
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In the given balanced chemical reaction,


\(\mathrm{IO}_3^{-}+\mathrm{aI}^{-}+\mathrm{bH}^{+} \rightarrow \mathrm{cH}_2 \mathrm{O}+\mathrm{dI}_2\)

The values of a, b, c, and d respectively are-

1. 5, 6, 3, 3

2. 5, 3, 6, 3

3. 3, 5, 3, 6

4. 5, 6, 5, 5

Subtopic:  Balancing of Equations |
 80%
From NCERT
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

Oxidation number of oxygen in potassium super oxide (KO2) is-

1. – 2

2. – 1

3. – 1/2

4. – 1/4

Subtopic:  Oxidizing & Reducing Agents |
 83%
From NCERT
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

 The strongest oxidising agent among the following is :

1. BrO3/Br2+,Eo=+1.50

2. Fe3+/Fe2+,Eo=+0.76

3. MnO4/Mn2+,Eo=+1.52

4. Cr2O72/Cr3+,Eo=+1.33

Subtopic:  Emf & Electrode Potential |
 80%
From NCERT
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

The oxidation number of S in H2S2O8 is:

1. + 2

2. + 4

3. + 6

4. + 7

Subtopic:  Oxidizing & Reducing Agents |
 69%
From NCERT
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

In the following reaction

Al + Fe3O4 Al2O3 + Fe

The total number of electrons transferred will be-

1. 6

2. 8

3. 8/3

4. 24

Subtopic:  Application of Electrode Potential |
From NCERT
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