NCERT Solutions Class 12 Chemistry Chapter 4 Chemical Kinetics

NCERT Class 12 Chemistry Solutions Chemical Kinetics - NCERT Solutions prepared for CBSE students by the best teachers in Delhi. 

Class XII  Chemistry

Chapter 4 . Chemical Kinetics

Question 1:

For the reaction R ¨ P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and seconds.

Question 2:

In a reaction, 2A → Products, the concentration of A decreases from 0.5 mol L⁻¹ to 0.4 mol L⁻¹ in 10 minutes. Calculate the rate during this interval?

Question 3:

The conversion of molecules X to Y follows second order kinetics. If concentration of X is increased to three times how will it affect the rate of formation of Y?

Question 4:

A first order reaction has a rate constant 1.15 10⁻³ s⁻¹. How long will 5 g of this reactant take to reduce to 3 g?

Question 5:

Time required to decompose SO2Cl2 to half of its initial amount is 60 minutes. If the decomposition is a first order reaction, calculate the rate constant of the reaction.

Question 6:

The rate of the chemical reaction doubles for an increase of 10 K in absolute temperature from 298 K. Calculate Ea.

Question 7:

The activation energy for the reaction

2HI(g) ¨ H2 + I2(g)

is 209.5 kJ mol.1 at 581K. Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy?

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