Which of the following is true for a reaction as per collision theory?

  • A
    Every collision between reactants leads to chemical reaction.
  • B
    It may be expected that rate of reaction is equal to rate of collision.
  • C
    For gas phase reactions,the number of collisions is far less compared to observed rate.
  • D
    The colliding molecules do not need proper orientation.

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What is the activation energy for a reaction if its rate doubles when the temperature is raised from $20 \,^{\circ}C$ to $35 \,^{\circ}C$ in $kJ \,mol^{-1}$? $(R = 8.314 \,J \,mol^{-1} \,K^{-1})$

For an exothermic reaction $A \rightarrow B$,the activation energy is $15 \, K \, cal/mol$ and the heat of reaction is $5 \, K \, cal/mol$. The activation energy for the reverse reaction $B \rightarrow A$ will be ......... $K \, cal/mol$.

The rate constant of a reaction at $500 \ K$ and $700 \ K$ are $0.02 \ s^{-1}$ and $0.2 \ s^{-1}$ respectively. The activation energy of the reaction (in $kJ \ mol^{-1}$) is $(R=8.3 \ J \ K^{-1} \ mol^{-1})$

Which of the following graphs of $\log \, K \rightarrow 1/T$ can be used to calculate the activation energy?

The rate of a reaction can be expressed by the Arrhenius equation as:
$k = A e^{-E_a / RT}$
In this equation,$E_a$ represents:

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