For the following reactions
it was found that Ea is decreased by 30 kJ/mol in the presence of catalyst.
If the rate remains unchanged, the activation energy for catalysed reaction is (Assume preexponential factor is same):
(1) 135 kJ/mol
(2) 105 kJ/mol
(3) 198 kJ/mol
(4) 75 kJ/mol
