Consider the reaction AB. The concentration of both the reactant and the product varies exponentially with time.

The graph that accurately depicts how reactant and product concentrations change with time is:

1.  2.
3. 4.

HINT: Change of concentration with time is exponential.

Explanation : Given reaction: AB

The concentration of reactants and products varies exponentially w.r.t time.

(i) Concentration of reactant (here, A) decreases exponentially w.r.t time.

(ii) Concentration of product (here, B) increases exponentially w.r.t time new line correct graph representing the above reaction is (2).