Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

Which of the following graphical trends best represents a first-order reaction?
Options
A A straight line when plotting concentration vs. time
B A straight line when plotting ln[A] vs. time
Correct Answer
C A curved line when plotting 1/[A] vs. time
D A flat line over time
Correct Answer

Option B is the correct answer.

Detailed Explanation

For a first-order reaction, the integrated rate law is ln[A] = -kt + ln[A]₀. This equation has the form of a straight line (y = mx + b) where y = ln[A], x = time, and the slope (m) is -k. Therefore, a plot of ln[A] versus time yields a straight line.

Hint

Recall the integrated rate law for a first-order reaction. Which function of [A] is linear with time?

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 227 of 1872
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