Quiz 4.1 – Introduction to Rate of Chemical Reaction

The rate of a chemical reaction is defined as:

The total amount of product formed B.

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The change in concentration of a reactant or product per unit time

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The heat released in a reaction

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The speed at which color changes

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Which of the following does not affect the rate of a chemical reaction?

Temperature

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Surface area

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Colour of reactants

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Concentration

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In a reaction, if increasing the concentration of reactants increases the rate, the reaction is:

Endothermic

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Dependent on surface area

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Dependent on concentration

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A reversible reaction

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The unit of rate of reaction is usually:

mol

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mol/L

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mol/L·s

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L/mol·s

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Which of the following will increase the rate of a reaction?

Decreasing temperature

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Removing a catalyst

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Increasing pressure (for gases)

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Diluting the solution

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A catalyst increases the rate of reaction by:

Increasing the temperature

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Increasing the concentration

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Providing an alternative pathway with lower activation energy

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Making the reaction endothermic

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Which factor affects the rate but not the equilibrium of a reaction?

Temperature

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Pressure

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Catalyst

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Concentration

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The initial rate of a reaction is:

The rate at equilibrium

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The fastest rate, measured at the start

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The average over the whole reaction

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The rate at the end

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Reactions occur faster when particles:

Are cold

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Move slowly

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Collide with sufficient energy and proper orientation

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Collide randomly

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In terms of particle theory, increasing temperature:

Decreases kinetic energy

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Decreases collisions

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Increases collision energy and frequency

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Lowers concentration

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Quiz 4.1 – Introduction to Rate of Chemical Reaction

Quiz 4.1 – Introduction to Rate of Chemical Reaction

Stephen March 28, 2025

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