Quiz 4.3 - Rate of Reaction (Part 2)

What is the rate of a chemical reaction?

The total amount of reactants used

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The energy released during the reaction

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

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The color change in a reaction

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Which of the following factors 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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Which of these methods is commonly used to measure the rate of a gas-producing reaction?

Measuring mass of solid left

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Counting number of bubbles

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Measuring volume of gas collected

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Recording temperature rise

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Which of the following reactions is the fastest?

Iron rusting

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Explosion of firecrackers

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Milk turning sour

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Digestion of food

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A reaction that takes several days to complete is considered:

Fast

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Instantaneous

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Moderate

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Slow

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Which of these is a slow chemical reaction?

Combustion of paper

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Photosynthesis

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Reaction of sodium with water

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Neutralization of acid and base

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In a reaction, 0.6 mol of hydrogen is used up in 30 seconds. What is the average rate of reaction?

0.02 mol/s

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0.2 mol/s

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18 mol/s

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2 mol/s

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A reaction produced 300 cm³ of CO₂ gas in 2 minutes. What is the rate in cm³/s?

150 cm³/s

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2.5 cm³/s

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30 cm³/s

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0.15 cm³/s

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If the concentration of HCl is increased in a reaction, the rate of reaction will:

Decrease

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Stay the same

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Increase

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Stop completely

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What is the unit of rate of reaction if volume of gas is measured in cm³ and time in minutes?

mol/min

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cm³/s

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cm³/min

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mol/cm³

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Quiz 4.3 – Rate of Reaction (Part 2)

Quiz 4.3 – Rate of Reaction (Part 2)

Stephen March 28, 2025

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