Question 1

What causes sliced apples to rot when not refrigerated?

Accepted Answer

Catalyst

Answer

Concentration

Answer

Temperature

Answer

Surface area

Question 2

When do chemical reactions come to a stop?

Accepted Answer

Not enough energy for the reaction.

Answer

Sufficient activation energy is present.

Answer

More than 3 reactants collide frequently.

Answer

Catalyst was consumed already

Question 3

If the reactants in a chemical reaction are heated, what usually happens?

Accepted Answer

Faster

Answer

Slower

Answer

In a smaller volume

Answer

At the same rate

Question 4

Which factor affects the rate of a chemical reaction in making dough?

Accepted Answer

Catalyst

Answer

Surface area of the reactant

Answer

Temperature

Answer

The concentration of the reactants

Question 5

Why do more reactants lead to more products in a reaction?

Accepted Answer

More reactants have more atoms to react to form more products

Answer

Too many products can slow down the reaction

Answer

More reactants cause the reaction to heat up

Answer

More reactants take up the same volume

Question 6

Which statement concerning rates of reactions is TRUE?

Accepted Answer

Increasing the surface area of the reactant makes chemical reactions faster.

Answer

Adding a catalyst slows down the rate of reaction.

Answer

Increasing the concentration of a reactant may decrease the rate of a reaction.

Answer

The higher the activation energy barrier, the faster the reaction.

Question 7

According to collision theory, what is necessary for a reaction to occur?

Accepted Answer

Effective collision and amount of energy must be right for a reaction to occur.

Answer

All collisions result in some sort of chemical reaction

Answer

Molecular orientation alone determines the effectiveness of a collision

Answer

The amount of energy of the particles determines whether a reaction occurs

Question 8

What accounts for the fact that powdered sugar dissolves more quickly than granulated sugar?

Accepted Answer

Surface area

Answer

Concentration

Answer

Temperature

Answer

Nature of reactants

Question 9

What is the general relationship between temperature and reaction rate?

Accepted Answer

The higher the temperature, the higher the reaction rate

Answer

There is no relationship between the two

Answer

The higher the temperature, the lower the reaction rate

Answer

Temperature and rate vary inversely

Question 10

What is a substance that increases the rate of a reaction without being used up called?

Accepted Answer

Catalyst

Answer

Activated complex

Answer

Intermediate product

Answer

Inhibitor

Related quizzes

Related quizzes