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AQA GCSE Chemistry 3.2

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Twenty questions on the second section of Unit 3 in AQA GCSE Chemistry: Water.
Matthew T
Quiz by Matthew T, updated more than 1 year ago
Matthew T
Created by Matthew T over 10 years ago
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Resource summary

Question 1

Question
True or false? Using hard water makes it more difficult for soap to lather.
Answer
  • True
  • False

Question 2

Question
Which of these rocks helps to cause hardness in water?
Answer
  • Gypsum
  • Granite
  • Dolomite
  • Calcite
  • Basalt

Question 3

Question
Which type of deposit forms when hard water reacts with soap?
Answer
  • Scale, calcium carbonate
  • Scum, calcium stearate

Question 4

Question
Which type of deposit forms when hard water is boiled?
Answer
  • Scale, calcium carbonate
  • Scum, calcium stearate

Question 5

Question
True or false? Calcium carbonate dissolves in carbonic acid (rainwater) to produce calcium ions and hydrogencarbonate ions.
Answer
  • True
  • False

Question 6

Question
Which type of hard water can be softened by heating?
Answer
  • Permanent hard water
  • Temporary hard water

Question 7

Question
True or false? Scale is formed upon heating temporary hard water because calcium hydrogencarbonate forms a precipitate.
Answer
  • True
  • False

Question 8

Question
Which of these methods can soften either type of hard water?
Answer
  • Washing soda
  • Boiling
  • Ion-exchange column

Question 9

Question
Which ion is exchanged with calcium and magnesium ions in an ion-exchange column?
Answer
  • Potassium K+
  • Sodium Na+
  • Cadmium Cd2+
  • Iron Fe3+

Question 10

Question
True or false? Ion-exchange columns do not need to be regularly washed out with saline solution.
Answer
  • True
  • False

Question 11

Question
What is the first stage in the water treatment process?
Answer
  • Passing water through a sand filter for clear water
  • Passing water through metal meshes to remove large objects
  • Chlorination of water to kill bacteria
  • Adding aluminium sulphate and lime to encourage flocculation of suspended particles in the water

Question 12

Question
What is the second stage in the water treatment process?
Answer
  • Passing water through a sand filter for clear water
  • Passing water through metal meshes to remove large objects
  • Chlorination of water to kill bacteria
  • Adding aluminium sulphate and lime to encourage flocculation of suspended particles in the water

Question 13

Question
What is the third stage in the water treatment process?
Answer
  • Passing water through a sand filter for clear water
  • Passing water through metal meshes to remove large objects
  • Chlorination of water to kill bacteria
  • Adding aluminium sulphate and lime to encourage flocculation of suspended particles in the water

Question 14

Question
What is the fourth stage in the water treatment process?
Answer
  • Passing water through a sand filter for clear water
  • Passing water through metal meshes to remove large objects
  • Chlorination of water to kill bacteria
  • Adding aluminium sulphate and lime to encourage flocculation of suspended particles in the water

Question 15

Question
What is often contained in a filter cartridge?
Answer
  • Activated carbon
  • Activated boron
  • Ion-exchange column
  • Fractionating column
  • Silver
  • Ruthenium

Question 16

Question
What are health benefits of drinking hard water?
Answer
  • Reduced risk of heart disease
  • Reduced risk of cancer
  • Stronger muscles
  • Stronger bones and teeth

Question 17

Question
Which gas is sometimes used as an alternative to chlorine in killing bacteria?
Answer
  • Fluorine
  • Hydrogen sulphide
  • Ozone
  • Methane

Question 18

Question
Which ion is sometimes added to water to reduce the risk of tooth decay?
Answer
  • Sulphate, SO42-
  • Fluoride, F-
  • Nitrate, NO3-
  • Potassium, K+

Question 19

Question
Which of these are arguments for the fluoridation of water?
Answer
  • Reduction in tooth decay
  • Increased risk of fluorosis
  • Protects people who don't have good dental hygiene
  • Impossible to set safe limits due to varied intake
  • Ethical issues of being forced to take a treatment
  • Reduced risk of heart disease

Question 20

Question
Which of these are arguments against the fluoridation of water?
Answer
  • Reduction in tooth decay
  • Increased risk of fluorosis
  • Protects people who do not have good dental hygiene
  • Impossible to set safe limits due to varied intake
  • Ethical issues with being forced to take a treatment
  • Reduced risk of heart disease
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