JEE Mains · Chemistry · STD 12 - 3. Chemical kinetics
The number of given statement/s which is/are correct is \(.....\). \((A)\) The stronger the temperature dependence of the rate constant, the higher is the activation energy. \((B)\) If a reaction has zero activation energy, its rate is independent of temperature. \((C)\) The stronger the temperature dependence of the rate constant, the smaller is the activation energy. \((D)\) If there is no correlation between the temperature and the rate constant then it means that the reaction has negative activation energy.
- A \(1\)
- B \(2\)
- C \(3\)
- D \(4\)
Answer & Solution
Correct Answer
(B) \(2\)
Step-by-step Solution
Detailed explanation
\(k = A \cdot e ^{- Ea / RT }\) \(\log k =\log A -\frac{ Ea }{2.303 R } \cdot \frac{1}{T}\) Higher is Ea, stronger is the temperature dependence of \(k\) (i.e. steeper the slope) \(\Rightarrow \frac{1}{ k } \frac{ dk }{ dT }=\frac{ Ea }{ R } \frac{1}{ T ^2}\)…
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