Chemistry-Order of Reaction

NEET Chemistry Order of Reaction MCQ Question

Type: MCQ-diagram based-Hard-Class 12

Consider a plot where ln[R] is plotted against time t for a first-order reaction. Which of the following correctly describes the slope of the line in this plot?

Question diagram
A

The slope is negative and equals -k.

B

The slope is positive and equals k.

C

The slope is zero, indicating a constant rate.

D

The slope is negative and equals ln[R]0.

Correct Answer

Option A

Detailed Explanation

In a first-order reaction, plotting ln[R] against time yields a straight line with a negative slope equal to -k, as derived from the equation ln[R] = ln[R]0 - kt.

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