Chemistry Quiz: Rate of Reaction, Reversible Reaction, Redox

What is the minimum energy needed for particles to collide and cause a reaction?

• Activation energy

• Thermal energy

• Potential energy

• Kinetic energy

How can you measure the rate of a reaction involving the production of hydrogen gas?

• The amount of zinc used up per minute

• The amount of hydrogen produced per minute

• The amount of sulfuric acid used up per minute

• The amount of zinc sulfate produced per minute

What does Le Chatelier's Principle state about a system at equilibrium when subjected to a change?

• It will adjust to oppose the change

• It will accelerate the change

• It will ignore the change

• It will reverse the change

In the Haber process, what is the effect of using a catalyst?

• Speeds up the reaction

• Increases the pressure

• Decreases the temperature

• Slows down the reaction

What is the oxidation number of magnesium in MgCl2?

• -1

• +2

• +1

• -2

What happens to acidified potassium permanganate in the presence of a reducing agent?

• No change in color

• Changes from purple to brown

• Changes from purple to colourless

• Changes from colourless to purple

Which factor affects equilibrium by shifting it to the side with the least moles of gas?

• Concentration

• Catalyst

• Pressure

• Temperature

What is the oxidation number of sulfur in the compound SO4^2-?

• +2

• +4

• +8

• +6

In a redox reaction, what does reduction involve?

• Loss of electrons

• Gain of oxygen

• Loss of hydrogen

• Gain of electrons

What is the effect of a higher concentration on the rate of reaction?

• Halts the reaction

• Increases the rate

• No effect on the rate

• Decreases the rate