List of top Chemistry Questions on d -and f -Block Elements asked in KEAM

The rate constants of a reaction at $300,K$ and $400,K$ are $1.5,s^{-1}$ and $3,s^{-1}$ respectively. The $E_a$ value is [$\log 2 = 0.3010,\ 2.303R=19,J,K^{-1}mol^{-1}$]