Collision Theory - Assessment

1.

Multiple Choice

45 sec

1 pt

What is collision theory?

Molecules must collide in the correct orientation with enough energy to bond.

Molecules need enough energy to collide and react.

Atoms constantly collide and react.

The minimum energy needed for atoms to react

2.

Multiple Choice

45 sec

1 pt

Which PE Diagram represents an endothermic reaction?

A

B

3.

Multiple Choice

45 sec

1 pt

Which PE Diagram represents an exothermic reaction?

A

B

4.

Multiple Choice

45 sec

1 pt

What is the rate of reaction?

How much energy is needed for a reaction to occur.

The energy required to break a bond.

The time it takes for a reaction to occur.

Collision Theory

5.

Multiple Choice

45 sec

1 pt

What is the purpose of a catalyst?

Helps to slow down a reaction

Raises the activation energy

Lowers the activation energy

Is consumed by the reaction

6.

Multiple Choice

45 sec

1 pt

What factors effect rate of reaction?

Temperature, Concentration, Pressure and Energy

Surface Area, Concentration, Energy and Pressure

Temperature, Pressure, Concentration and Surface area

Pressure, Surface area, Density and Energy

7.

Multiple Choice

45 sec

1 pt

Would the reaction rate speed up or slow down: A tablespoon of powdered sugar placed into HCL.

Slow down

Speed up

Stays the same

8.

Multiple Choice

45 sec

1 pt

Increasing the temperature of your solution will...

Not affect the rate of reaction.

Speed up the rate of reaction

Slow down the rate of reaction

9.

Multiple Choice

45 sec

1 pt

Decreasing the concentration of a substance will usually...

Slow down the reaction

Speed up the reaction

Have no affect on the reaction

10.

Multiple Choice

45 sec

1 pt

Which has more surface area?

Large chunks of chalk

Cube of sugar

Powdered sugar

Small chunks of sugar

11.

Multiple Choice

45 sec

1 pt

If you shrink the container size that your gas substance is in what will happen?

The reaction rate will stay the same

The reaction rate will speed up

The reaction rate will slow down

12.

Multiple Choice

45 sec

1 pt

If the reactant particles collide with less than the activation energy, the particles will be rebound, and no reaction will occur.

True

False

13.

Multiple Choice

45 sec

1 pt

With the increase in temperature, the average kinetic energy of the molecules increases, leading to a decrease in number of collisions per unit time.

True

False

14.

Multiple Choice

45 sec

1 pt

The collisions which bring about a chemical reaction are called:

Consistent collisions

Normal collisions

Effective collisions

None of the above

15.

Multiple Choice

45 sec

1 pt

More collisions correspond to a:

Faster reaction rate

Slower reaction rate

Constant reaction rate

None of the above

16.

Multiple Choice

45 sec

1 pt

What criteria must be met for reactant collisions to result in a successful product?

The reactants must collide with each other

The reactants must collide with enough energy and be in the right positions

The reactants must have enough energy to form the activated complex

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