Chemical Reactions Quiz

What happens to the rate of the reaction when the particle size decreases?

• The rate of the reaction increases.

• The rate of the reaction decreases.

• The rate of the reaction stays the same.

• The rate of the reaction stops.

What happens to the rate of the reaction when the particle size increases?

• The rate of the reaction increases.

• The rate of the reaction decreases.

• The rate of the reaction stays the same.

• The rate of the reaction stops.

What happens to the rate of a reaction when the temperature increases?

• The rate of reaction decreases.

• The rate of reaction stays the same.

• The rate of reaction increases.

• The rate of reaction stops.

Why does increasing temperature increase the rate of reaction?

• Particles collide less often with less energy.

• Particles collide more often with more energy.

• Particles stop colliding.

• Particles move slower.

What is the result of more successful collisions in a reaction?

• The reaction rate decreases.

• The reaction rate stays the same.

• The reaction rate increases.

• The reaction stops.

What happens to the reaction rate when the concentration is decreased?

• The reaction rate increases.

• The reaction rate decreases.

• The reaction rate stays the same.

• The reaction rate stops completely.

What happens to the reaction rate when the concentration is increased?

• The reaction rate decreases.

• The reaction rate stays the same.

• The reaction rate increases.

• The reaction rate stops completely.

Why does the reaction rate increase when the concentration is increased?

• Because there are fewer particles in a given volume.

• Because there are more particles in a given volume.

• Because the particles move slower.

• Because the particles disappear.

What is a catalyst?

• A substance that speeds up a chemical reaction and can be recovered chemically unchanged.

• A substance that slows down a chemical reaction and changes chemically.

• A substance that speeds up a chemical reaction and changes chemically.

• A substance that slows down a chemical reaction and can be recovered chemically unchanged.

If you start a reaction with 1g of a catalyst, how much of the catalyst will remain at the end of the experiment?

• 0g

• 0.5g

• 1g

• 2g