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Rates of Reaction and Organic Chemistry: Multiple Choice Assessment

Questions
Grade 12
English

Rates of Reaction and Organic Chemistry: Multiple Choice Assessment

Multiple Choice Questions

  1. Which of the following factors does NOT affect the rate of a chemical reaction?
a) Temperature
b) Concentration of reactants
c) Size of the reaction vessel
d) Presence of a catalyst
  1. Increasing the temperature of a reaction generally causes the rate of reaction to:
a) Decrease
b) Remain unchanged
c) Increase
d) Stop completely
  1. A catalyst works by:
a) Increasing the activation energy required
b) Decreasing the activation energy required
c) Increasing the temperature
d) Consuming reactants
  1. In organic chemistry, which family of compounds contains a carbonyl group bonded to at least one hydrogen atom?
a) Ketones
b) Alcohols
c) Aldehydes
d) Carboxylic acids
  1. Which of the following is a correct method to measure the rate of a reaction that produces a gas?
a) Measuring the increase in temperature
b) Measuring the decrease in mass
c) Measuring the change in color only
d) Measuring the pH directly
  1. What effect does increasing the concentration of reactants have on the rate of reaction?
a) Decreases the rate
b) Has no effect
c) Increases the rate
d) Stops the reaction
  1. Which statement best explains why powdered solids react faster than large chunks?
a) Powders have a smaller surface area
b) Powders have a greater surface area
c) Powders are less dense
d) Powders are heavier
  1. Which organic family is characterized by the presence of an -OH group?
a) Aldehydes
b) Ketones
c) Alcohols
d) Carboxylic acids
  1. Which of the following describes the energy change that occurs when a catalyst is used in a reaction?
a) The activation energy increases
b) The activation energy decreases
c) The overall energy change increases
d) There is no change in activation energy
  1. The rate of reaction can be increased by:
a) Lowering the temperature
b) Decreasing reactant concentration
c) Adding a catalyst
d) Removing products as they form
  1. Which technique is most commonly used to determine the structure of organic compounds?
a) Filtration
b) Spectroscopy
c) Distillation
d) Chromatography
  1. In a reaction between hydrochloric acid and magnesium, which observation would best indicate the rate of reaction?
a) The color change of the solution
b) The mass of magnesium remaining
c) The volume of hydrogen gas produced over time
d) The temperature of the room