Question

Answer the following questions (Do any two) : (a) Identify the order of reaction from the following unit for its rate constant : Lmol⁻¹s⁻¹ (b) The conversion of molecules A to B follow second order kinetics. If concentration of A is increased to three times, how will it affect the rate of formation of B? (c) Write the expression of integrated rate equation for zero order reaction.

The reaction rate constant can be defined as the rate of reaction when each reactant's concentration is ……..

The rate of reaction is concerned with decrease in concentration of reactants or increase in the concentration of products per unit time. It can be expressed as instantaneous rate at a particular instant of time and average rate over a large interval of time. Mathematical representation of rate of reaction is given by rate law. Rate constant and order of a reaction can be determined from rate law or its integrated rate equation.

(a) The variation in the concentration (R) vs. time (t) plot is given below. Answer the following questions on the basis of the given figure: (i) Predict the order of the reaction. (ii) What is the slope of the curve? (iii) What are the units of the rate constant k?