Practice Test

Question 1

Which statement best describes the use of catalytic converters in automobiles?

Revolt · Accepted Answer

A: They oxidize hydrocarbons to form less toxic gases.

Question 2

Which statement is usually true about the relationship between activation energy and reaction rates?

Revolt · Accepted Answer

B: High activation energy barriers result in low rates.

Question 3

Which definition describes activation energy?

Revolt · Accepted Answer

B: the minimum energy that a set of reactants must attain before reaction can occur

Question 4

In the hypothetical reaction below, substance cap A is consumed at a rate of 2 point 0 times mol over cap l times s If this reaction is at dynamic equilibrium, at what rate will substance cap b be consumed? cap A sub long left right arrow cap b

Revolt · Accepted Answer

B: 2 point 0 times mol over cap l times s

Question 5

Consider this chemical reaction of bromothymol blue indicator. It appears yellow in undissociated form and blue in its dissociated aqueous solution. Expand Image What will be the color of the solution if a large amount of cap h sub 2 CO sub 3 is added?

Revolt · Accepted Answer

A: The solution will remain yellow.

Question 6

According to Le Chatelier’s principle, a change in pressure affects the chemical equilibrium of the reaction system under what condition?

Revolt · Accepted Answer

C: Some of the reactants or the products are in the gaseous phase.

Question 7

Consider the rate law. cap A plus 3 cap b rightarrow 2 cap c plus 2 cap d The rate increases by a factor of 9 when the concentration of cap A triples.The rate triples when the concentration of cap b triples. What is the new rate law for the reaction?

Revolt · Accepted Answer

A: cap r is equal to k cap A squared cap b

Question 8

What advantage does a heterogeneous catalyst provide over a homogeneous catalyst in industrial processes?

Revolt · Accepted Answer

C: A heterogeneous catalyst can be easily separated from reactants.

Question 9

Which statement best describes why rate laws are important?

Revolt · Accepted Answer

C: to determine how fast a chemical reaction will take place

Question 10

Which is true about reaction rates?

Revolt · Accepted Answer

D: Reaction rates are not related to spontaneity.

Practice Test Answers

More from this Course

TRY EDGENUITY HACKS