For each of the following statements, determine whether the statement is true or false; if statement is false, provide an explanation why false

a) Catalyst works by lowering action barrier of rate limiting step

b) In a 1st order reaction, concentration of reactant is doubled then rate of reaction is doubled.

c) Equilibrium constant for reaction will never be affected by changing the concentration of any compound

d) Equilibrium constant always contains the product concentration of all products raised to appropriate powers divided by product of concentration of all reactants raised to appropriate powers

e) At equilibrium, rate constant for a forward reaction is equal to the rate constant if a reverse reaction

f) Yield of exothermic reaction can be increased by raising the temperature