urgent help required

Question

Which of the following statements concerning rate laws is true? 

A. All reactants must appear in the rate law

B. The rate constant increases when the rate increases

C. Products may appear in the rate law

D. The exponents of each reactants may be added to obtain the overall order

E. None of the above are all true statements

Answer 1

A. All reactants must appear in the rate law - not true b/c catalysts, intermediates and zero order don't appear

B. The rate constant increases when the rate increases - not true. k is a constant and does not change

C. Products may appear in the rate law - not true. rate is dependent on reactants

D. The exponents of each reactants may be added to obtain the overall order - not true unless it is an elementary step.

E. None of the above are all true statements - TRUE