Question

1. In an endothermic reaction the products are....

A.	None of the above.

B.At the same energy as the reactants.

C. At a higher energy than the reactants.

D. At a lower energy than the reactants.

2. The rate determining step for a reaction is characterized by...

A.	None of the above.

B.	A high activation energy

C. Transition state resembling the reactants.

D.	An intermediate at a lower energy than the reactant.

3. When is a reaction exothermic?

A.	None of the above.

B..	Entropy negative.

C. Gibbs free energy positive.

D. Enthalpy negative.

4. Which of the following is an example of a homogeneous catalyst?

A.

Platinum

B.

Hydronium

C.Paladium

D.

Tin

Answer 1

Solution:
1) In an endothermic reaction the products are....
(C) At a higher energy than the reactants.
In an endothermic reaction the energy of the products is higher than the energy of the reactants. Endothermic reactions are reactions that require energy from external source.

2. The rate determining step for a reaction is characterized by..
(B) A high activation energy

3. Reaction exothermic when-
(D) Enthalpy negative.
It is the difference between sum of enthalpies of product and sum of enthalpies of reactant.In exothermic reactant have more energy than product.

4.Example of a homogeneous catalyst?
(B) Hydronium
Homogenous catalyst allow high interaction between catalyst and reactant
molecules.