Question

Which concentration plot is linear for a first order reaction?

• A. $ [A] $ versus time
• B. In $ [A] $ versus time
• C. $ log [A] $ versus $ 1/ $ time
• D. Square root of $ [A] $ versus time

Answer 1

Answer: (B)

For first order reaction,
$[A]=[A]_{0} e^{-k t}$ or $\ln [A]=\ln [A]_{0}-k t$

$\therefore $ In $A$ versus time plot is linear for first order reaction.