Catalysts

Question 1

Which catalyzed reaction breaks up ozone?

Revolt · Accepted Answer

O3 + O 2O2

Question 2

Which statement defines activation energy?

Revolt · Accepted Answer

It is the difference between reactant energy and maximum energy.

Question 3

Which statement describes a heterogeneous catalyst?

Revolt · Accepted Answer

It is in a different phase than the reactants.

Question 4

Which characteristic of enzymes allows it to be highly specific in the reactions they catalyze?

Revolt · Accepted Answer

its structure

Question 5

Which statement describes a catalyst?

Revolt · Accepted Answer

Catalysts provide a lower energy pathway for the reaction.

Question 6

Which reaction is an example of heterogeneous catalysis?

Revolt · Accepted Answer

Ethene gas reacts with hydrogen gas by using a nickel catalyst.

Question 7

What overall effect does adding a catalyst have on a chemical reaction?

Revolt · Accepted Answer

It lowers the activation energy that is needed.

Question 8

Why are enzymes required for living things to function?

Revolt · Accepted Answer

Reactions take place too slowly at body temperature and must be speeded up.

Question 9

Which statement best describes the use of a catalyst in a fuel cell?

Revolt · Accepted Answer

It increases reaction rates.

Question 10

Which of the following statements describes how enzymes differ from ordinary chemical catalysts?

Revolt · Accepted Answer

Enzymes catalyze select chemical reactions.

Catalysts Answers