Chemistry questions .. please help.. thanks?

Question

1- What is the minimum energy barrier that must be overcome for a chemical reaction to occur?

A) Activation energy

B) Rate limiting energy

C) Net energy

D) Potential energy

2- Which statement below regarding the half-life of a zeroth-order reaction is true?

a) each half-life is half as long as the preceding half-life

b) the half-life remains unchanged throughout the course of the reaction

c) each half-life is twice as long as the preceding half-life

d) each half-life is four times as long as the preceding half-life

Answer 1

1. A

2. B