NEET Chemistry Rate of Reaction MCQ Question
Consider a plot of ln[R] vs time for a first-order reaction. Which of the following correctly describes the characteristics of the plot?
The slope of the plot equals -k, where k is the rate constant.
The plot shows a curve, since ln[R] changes exponentially with time.
The intercept of the plot is equal to zero.
The slope of the plot is positive, indicating a direct relationship.
Correct Answer
Detailed Explanation
In a first-order reaction, plotting ln[R] against time yields a straight line with a negative slope equal to -k, where k is the rate constant, as derived from the equation ln[R] = ln[R]0 - kt.
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