AQA (9-1) Topic 6

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GCSE Chemistry (AQA) Quiz on AQA (9-1) Topic 6, created by https:// revisechemistry.uk on 03/01/2018.

Resource summary

Question 1

Question
Which of the following statements is true about chemical reactions?
Answer
  • Catalysts increase the amount of product formed
  • Large quantities of catalyst are needed
  • Catalysts are always used up during a reaction
  • Catalysts increase the rate of reaction

Question 2

Question
Select the correct statement about how the rate changes during the reaction.
Answer
  • it increases, then decreases to zero
  • it decreases to zero
  • it stays the same
  • it increases from zero

Question 3

Question
Select all the factors that can change the rate of reaction. (hint: there's more than one)
Answer
  • catalysts
  • temperature
  • surface area
  • pressure
  • concentration
  • size of container
  • height
  • volume

Question 4

Question
Using data from the table, when did the reaction stop? [blank_start]80[blank_end] seconds.
Answer
  • 80
  • 0
  • 20
  • 40
  • 60
  • 100

Question 5

Question
Using data from the table, what was the mean rate of reaction? [blank_start]0.5[blank_end] cm3/s
Answer
  • 0.5

Question 6

Question
Which line represents the fastest overall reaction?
Answer
  • A
  • B
  • C

Question 7

Question
The activation energy for a reaction was measured with and without a catalyst. Select the value below that was the value for the catalysed reaction.
Answer
  • 72 kJ/mol
  • 55 kJ/mol

Question 8

Question
Increasing the [blank_start]surface area[blank_end] of reactants frees up more particles that are available to [blank_start]collide[blank_end] right away. This doesn't add more particles in to the reaction, it only allows particles that would have once had to wait for other particles to react first to be available. This leads to more [blank_start]frequent[blank_end], successful collisions and so the rate of reaction [blank_start]increases[blank_end].
Answer
  • surface area
  • collide
  • frequent
  • increases

Question 9

Question
There are three main ways to measure the rate of a reaction:
Answer
  • the change of mass of reactants over time
  • the volume of gas produced over time
  • the time taken for a solution to change colour, or form a precipitate
  • the change in volume of reactants over time
  • the mass of gas produced over time
  • the time taken for a solution to form

Question 10

Question
Equilibrium is reached when the forward and reverse reactions occur at similar rates.
Answer
  • True
  • False

Question 11

Question
The concentrations of the reactants vs products are not necessarily equal at equilibrium, and there is usually more of one than the other. If the concentration of the reactants is higher than products, we say the equilibrium lies to the [blank_start]left[blank_end]. If the concentration of the products is higher than the reactants, we say the equilibrium lies to the [blank_start]right[blank_end].
Answer
  • left
  • middle
  • right
  • right
  • middle
  • left
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