Ncert Solutions Chemistry Class 12th

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.

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct Option: (iii)

 The difference between electrode potential potentials of two electrodes when no current is drawn through the cell is termed as cell emf. It is the energy provided by a cell per coulomb of charge passing through it. It is the maximum potential difference between the electrodes of a cell.

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

At room temperature, the redox titration of  KMnO₄vs oxalic acid is exceedingly slow; nevertheless, as the temperature rises, so does the rate of reaction. At a temperature of 500c., KMnO₄ is acidified with dil H₂SO₄ and interacts with oxalic acid.

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

Thermodynamic feasibility is determined by ΔG factors. So, while the conversion of diamond to graphite is thermodynamically viable, the reaction is sluggish and has a high activation energy.

Gibb's free energy is ΔG
ΔG =Rtlnk

ΔG_{P, T $>$}  o

at constant pressure and temperature should be negative or less than 0.

For example, Diamond to be converted to Graphite

ΔG=−ve

It is theoretically conceivable, but the rate is extremely slow, and the activation energy is extremely high. The energy required to transform diamond to graphite is insufficient.