Class 12th

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct Option: (iv)

is the highest positive value among the given species. So Mn²⁺ is the most stable ion in its reduced form.

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct Option: (iii)

According to the electrochemical series, the lower the reduction potential higher is the reducing power.

Therefore, the order of reducing power is Mn²⁺ < Cl < Cr³⁺ < Cr

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct Option: (iii)

According to the electrochemical series higher the positive value of standard reduction potential of metal ion, the higher is the oxidizing power

Therefore, MnO₄⁻ is the strongest oxidizing agent.

This is a Short Answer Type Question as classified in NCERT Exemplar

Incorrect order results from a balanced chemical equation. KClO₃ + 6FeSO₄ + 3H₂SO₄→KCl + 3H₂O + 3Fe₂ (SO₄)₃

This reaction is complex and occurs in several steps. The order is determined by the slowest in the reactions

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct Option: (ii)

According to the electrochemical series and standard reduction potential of metal, the higher the negative value of standard reduction potential stronger will be the reducing agent

In the given options, the standard reduction potential of chromium has the highest value so it is the strongest reducing agent.

This is a Short Answer Type Question as classified in NCERT Exemplar

Simple reactions occur in a single stage, whereas complicated reactions occur in multiple steps. Each phase in a multi-step process has its own molecularity, which is not added together. There is no molecularity in complex reactions. The sequence of a complex reaction is decided by the slowest step. As a result, it can be used for both simple and complex processes

This is a Short Answer Type Question as classified in NCERT Exemplar

The number of molecules of the reactants involved in an elementary reaction is referred to as the molecularity of the reaction. For this, a single molecule with a minimum molecularity of one is required, and it cannot be zero

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct Option: (iii)

On the application of external potential, an increased reaction starts till the opposing voltage becomes 1.1V.

However, further increase in the external potential leads the reaction to start in an opposite direction functioning as an electrolytic cell which is a device that uses electrical energy for carrying out electrochemical reactions.