Q. Which of the following graphs most appropriately represents a zero order reaction ?
A) [image:2025J23S2_Q54_opt_a.png]
B) [image:2025J23S2_Q54_opt_b.png]
C) [image:2025J23S2_Q54_opt_c.png]
D) [image:2025J23S2_Q54_opt_d.png]
Explanation
[Solution by Dr. Abubacker] For a zero-order reaction $[R]=[R]_0-kt$, so the concentration falls linearly with time (a straight line with negative slope), and the rate is constant. Only graph (1), concentration against time as a straight falling line, represents this. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.