Welcome to the Quiz!

This quiz contains 16 questions from a mix of 1 subtopics.

Name four factors that affect the rate of chemical reactions.

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4

theory states that for particles to react, they have to collide with sufficient energy.

Collision

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The minimum amount of energy required for a reaction to take place is called the energy.

activation

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When considering how a condition will affect the rate of reaction, you have to consider how it will affect the  of collisions, and/or the  of the particles.

frequency
energy

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Explain how the rate of reaction changes with increasing temperature. 

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Illustration showing two particles colliding with a burst of energy.

Which of the following increase the frequency of collisions of the particles in a reaction?

(Select all that apply)

Decreasing the pressure

Increasing the temperature

Using powder instead of small chunks

Increasing the concentration

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Three grams of magnesium is added to water.


Which form of magnesium would give the highest rate of reaction?

Small chunks

Powder

One large piece 

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A substance that increases the rate of a reaction without being chemically changed, or used up, is called a .

catalyst

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Diagram showing the energy progress of a reaction with labels for reactants, products, and activation energy.

On the image above, which of the lines represents the activation energy of the reaction?

A

B

C

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Two graphs comparing the progress of a chemical reaction with and without a catalyst.

The two graphs above show the same chemical reaction, but in the presence and absence of a catalyst. Which one shows the reaction occurring in the presence of a catalyst?

Graph 2

Graph 1

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Which three of the following are examples of catalysts?

Cobalt

Nickel

Oxygen

Enzymes

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Should you include the catalyst in the chemical reaction as one of the reactants? 

Yes

No

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Do transition metals make good catalysts?

Yes

No

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Which of the following increase the amount of energy the particles in a reaction have?

Using powder instead of small chunks

Increasing the temperature

Using a catalyst

Decreasing the concentration of a solution

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Which of the following increase the rate of a reaction?

(Select all that apply)

Using lumps instead of powder

Increasing the temperature

Decreasing the temperature

Increasing the pressure of a gas

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True or false? A catalyst is a substance which increases the rate of a reaction without being chemically changed, or used up.

True

False

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