Question

each affect the reaction rate except:

-temp

-free energy change for the reaction

-catalyst

-magnitude of activation barrier

-reactant concentration

Answer 1

Free energy change does not affect the rate.

Temperature is a very vital parameter in rate of reaction. Increase in temperature generally decreses rate as collisions increase but required collisions in particular orientation giving products decrease.
Catalyst ha the purpose of changing the rate of the reaction.
Variation in concentraion changes rate unless the reaction unless reaction is 0 order.
Activation barrier changes the rate constant itself of the reaction , thus changing the rate too