Catalysts — Quiz

Question 1

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

Revolt · Accepted Answer

It lowers the activation energy that is needed.

Question 2

Which reaction is an example of heterogeneous catalysis?

Revolt · Accepted Answer

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

Question 3

Which catalyzed reaction breaks up ozone?

Revolt · Accepted Answer

cap o sub 3 plus cap o cs set over right arrow 2 cap o sub 2

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 of these statements describes how enzymes differ from ordinary chemical catalysts?

Revolt · Accepted Answer

Enzymes catalyze select chemical reactions.

Question 6

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

Revolt · Accepted Answer

It increases reaction rates.

Question 7

Which statement defines activation energy ?

Revolt · Accepted Answer

It is the difference between reactant energy and maximum energy.

Question 8

The second reaction in the formation of sulfuric acid occurs slowly. 2 SO sub 2 g plus cap o sub 2 times g rightarrow 2 SO sub 3 g NO sub 2 is added to the reaction to speed it up. In which form would this substance be a homogeneous catalyst for this reaction?

Revolt · Accepted Answer

NO sub 2 times g

Question 9

Why does platinum metal make a good catalytic surface for reactant molecules?

Revolt · Accepted Answer

It holds reactant molecules in a good position for them to react.

Question 10

Which statement describes a catalyst ?

Revolt · Accepted Answer

Catalysts provide a lower energy pathway for the reaction.

Catalysts — Quiz Answers

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