MHT CET202615 April 2026Morning ShiftChemistryChemical KineticsActual
What is the value of the slope of a graph obtained by plotting the concentration of reactant (A)_t versus time for zero order reaction?
Options
- A-k
- B1/2k
- Ck/2.303
- D2.303/k
Correct answer
A. -k
Step-by-step solution
For a zero order reaction, the rate of reaction is independent of the concentration of the reactant. The integrated rate equation for a zero order reaction is given by: [A]_t = -kt + [A]₀ where [A]_t is the concentration of the reactant at time t , [A]₀ is the initial concentration, and k is the rate constant. Comparing this equation with the equation of a straight line y = mx + c , we get: y = [A]_t x = t m = -k c = [A]₀ Thus, plotting the concentration of reactant [A]_t versus time t yields a straight line with a