LONG QUIZ IN GENERAL CHEMISTRY 2

The rate for this reaction order is independent of concentration.

• zero-order reaction

• first order reaction

• second order reaction

• third order reaction

For the reaction 2A + B + 2C D + 2E, the rate law is: rate =k[A]2[B]1[C]1. Which of the following statements is false?

• 1. The reaction is second order in [A].

• 1. The reaction is second order in [C].

• 1. The reaction is first order in [B].

• 1. The reaction is 4th order overall.

Which is true for all zero-order reactions?

• 1. A plot of time vs concentration squared is linear.

• 1. The rate is independent of time.

• 1. Ea is very low.

• 1. The rate is constant.

Given A +3B --> 2C + D. This reaction is first order with respect to reactant A and second order with respect to reactant B. If the concentration of A is doubled and the concentration of B is halved, the rate of the reaction would _____ by a factor of _____.

• 0. increase, 2

• 0. increase, 4

• 0. decrease, 2

• 0. decrease, 4

For the rate law Rate = k[A][B]3/2, the order with respect to A is ______, the order with respect to B is ______, and the overall reaction order is _______.

• 1. 0; 3/2; 3/2

• 1. 1; 3/2; 5/2

• 1. 1; 3/2; 1

• 1. 1; 3/2; 7/2

For collisions to be successful, reactants must have __________.

• 1. favorable geometry only

• 1. sufficient kinetic energy

• 1. sufficient heat of reaction

• 1. sufficient kinetic energy and favorable geometry

Which combination of the given factors is required for successful collisions?

1. I. Reactant particles collide

2. II. Sufficient kinetic energy is present

3. III. A favorable geometry exists

• I, II

• II, III

• I, II, III

• I, III

The activation energy of a reaction is the amount of energy necessary to form the products.

• products

• catalysts

• reaction mechanism

• activated complex

Which of the following statements is correct about chemical reaction and molecular collision?

• Any chemical reaction results in the breaking of some bonds (which requires energy) and the formation of new ones (which releases energy).

• Particles that lack the necessary kinetic energy may collide and result to a chemical reaction.

• If a collision is relatively gentle, there is sufficient energy available to initiate the bond- breaking process, and thus the particles do not react.

• All collisions result to a chemical reaction.

The rate of a reaction depends on __________.

• 1. collision frequency

• 1. collision orientation

• 1. collision energy

• 1. all of the above