Ncert Exercises & Solutions

For a general reaction A B, plot of concentration of A vs time is given in the figure. Answer the following questions on the basis of this graph.

1. What is the order of the reaction?

2. What is the slope of the curve?

3. What are the units of the rate constant?

(i) For A B the given graph shows a zero-order reaction. Mathematically represented as

$[R] = - kt + {[R]}_{0}$

Which is the equation of a straight line. Hence, the reaction is a zero-order.

(ii) Slope =-k

(iii) Unit of zero-order reaction is mole m-L s-1.