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Question
The slope in the plot of ln[R] vs. time for a first order reaction is ______.
Options
`(+k)/2.303`
– k
`(-k)/2.303`
+ k
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Solution
The slope in the plot of ln[R] vs. time for a first order reaction is – k.
Explanation:
For the reaction, R `rightarrow` Products
The integrated first order rate equation is
ln [R] = – kt + ln [R0]
Comparing the above equation with a straight line equation y = mx + c
∴ y = ln [R], x = t, slope = – k and intercept = ln [R0]
Thus, the slope for first order reaction is – k.
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