Rates of reaction and reversible reactions

What name is given to the minimum amount of energy needed by particles for them to react when they collide?

• Activation energy

• Catalytic energy

• Threshold energy

What is the name of the model which is used to explain how different factors affect the rate of a reaction?

• Particle theory

• Big Bang theory

• Collision theory

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What piece of apparatus could be used to measure the volume of gas produced in a reaction

• Gas syringe

• Beaker

• Top pan balance

Which of the following is a possible unit for rate of reaction?

• cm³/s

• m/s

• N

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Which of the following would speed up a reaction?

• Using lumps instead of powder

• Increasing the concentration of an acid

• Decreasing the temperature

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Which of the following will increase the frequency of successful collisions?

• Increasing the temperature

• Decreasing the pressure

• Decreasing the concentration

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Which of the following has the smallest surface area to volume ratio?

• Powder

• Gauze

• Lumps

Which of the following statements about catalysts is false?

• They speed up reactions

• They provide an alternative reaction pathway with a lower activation energy

• They become chemically changed at the end of the reaction

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Which of the following will increase the proportion of successful collisions?

• Increasing the temperature

• Increasing the pressure

• Increasing the concentration

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Which of the following would give a steeper curve on a graph of volume of gas against time?

• Low temperature

• Low concentration

• Using a catalyst

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