Chemistry-Order of Reaction
NEET Chemistry Order of Reaction MCQ Question
Type: MCQ-diagram based-Medium-Class 12
A diagram shows a plot of ln[R] versus time for a first-order reaction. What is the significance of the slope of this plot?
A
The slope represents the negative rate constant (-k) of the reaction.
B
The slope is equal to the concentration of the reactant at time zero.
C
The slope indicates the half-life of the reaction.
D
The slope represents the activation energy of the reaction.
Correct Answer
Option A
Detailed Explanation
For a first-order reaction, plotting ln[R] against time yields a straight line with a slope equal to -k, the negative rate constant, as per the rearranged first-order rate equation.
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