The number of correct statements from the following is___
A) Large the activation energy smaller is the value of the rate constant.
B) The higher is the activation energy higher is the value of the temperature coefficient.
C) At lower temperatures increase in temperature causes more change in the value of k than at higher temperature.
D) A plot of ln k vs 1/T is a straight line with slope equal to -E_a/R

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answer is 3.

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Detailed Solution

K = Ae^-Ea/RT
A) as E_a inc, K dec
B) temp coeff = $= \frac{K_{t + 10}}{K_{t}}$
In $\frac{K_{2}}{K_{1}} = \frac{E_{a}}{R} (\frac{10}{T_{1} \cdot T_{2}})$
For same T₁, T₂ as E_a inc, temp coeff inc.
C) At lower temperatures, inc in temp causes less change in value of K than at higher temperature
$D) \ln K = \ln A - \frac{E_{a}}{RT}$
$∴$ In K vs 1/T is a straight line with slope = -E_a/R
$∴$ true statements are : ABD = 3