Rate of Reactions Quiz

What is one of the factors that affect the rate of reaction?

• Mass

• Concentration

• Volume

• Pressure

Which factor can increase the rate of reaction?

• Decreasing temperature

• Decreasing concentration

• Removing catalyst

• Increasing

  surface area

Why does a higher concentration increase the rate of reaction?

• 
  it increases the amount of reactants

• it increases the energy of reactant particles

• it lowers the activation energy

• 
  it increases the frequency of collision

Grinding an effervescent tablet into powder increases the rate of reaction due to increase of

• concentration

• 
  total surface area

• 
  temperature

• size

You add more bodies into a "mosh pit" to hope for more collisions. You have increased

• 
  concentration

• 
  temperature

• 
  catalyst

• pressure

Why does breaking up a solid reactant increase the rate of reaction?

• 
  it creates more solid

• it increases the total surface area

• 
  

  it creates more energy

• 
  it increases the concentration

Which of the following reactions occurs at the highest rate?

• 
  Photosynthesis

• 
  

  Rusting of iron

• Combustion of magnesium in oxygen

• Food Decay

The following equation shows the reaction between calcium carbonate, CaCO₃ and hydrochloric acid, HCl:

CaCO_3(aq) + 2HCl_(aq) → CaCl_2(aq) + CO_{2 (g)­­} + H₂O_(l)

Which of the following is the suitable method to determine the rate of reaction?

• Change in the volume of carbon dioxide gas with time

• 
  Change in the mass of water with time

• 
  
  Change in the temperature of the solution with time

• Change in the concentration of hydrochloric acid with time

Table 9 shows the experiments carried out to study the rate of reaction between zinc carbonate and nitric acid.

Which of the following graph represents the two experiments?

• 
• 
• 
• 

Which unit is correct for the rate of reaction?

• 
  g mol^-1

• 
  mol dm^-3

• g min^-1

• kJ mol^-1