Jamie Caffey
Quiz by , created more than 1 year ago

Quiz on GCSE AQA Chemistry Unit 3 Water Quiz, created by Jamie Caffey on 10/04/2015.

12
0
0
Jamie Caffey
Created by Jamie Caffey over 11 years ago
Close

GCSE AQA Chemistry Unit 3 Water Quiz

GCSE AQA Chemistry Unit 3 Water Quiz

Question 1 of 16

1

Soft water lathers easily with soap

Select one of the following:

  • True
  • False

Explanation

Question 2 of 16

1

What does hard water produce when it reacts with soap?

Select one of the following:

  • Scale

  • Scum

Explanation

Question 3 of 16

1

What ions does hard water contain?

Select one of the following:

  • Calcium and magnesium

  • Carbon and potassium

Explanation

Question 4 of 16

1

Temporary hard water produces scale when heated

Select one of the following:

  • True
  • False

Explanation

Question 5 of 16

1

What does scale do?

Select one of the following:

  • Reduce the efficiency of heating systems and cause blockages

  • Evaporate when heated

Explanation

Question 6 of 16

1

How are calcium compounds good for our health?

Select one of the following:

  • Help develop strong bones and teeth. May reduce the risk of heart disease.

  • They do not have any particular health benefits

  • Help with fighting infection

Explanation

Question 7 of 16

1

Permanent hard water is not softened by boiling and does not produce scale when heated

Select one of the following:

  • True
  • False

Explanation

Question 8 of 16

1

Washing soda is sodium carbonate

Select one of the following:

  • True
  • False

Explanation

Question 9 of 16

1

How are ions precipitated out of hard water?

Select one of the following:

  • Sodium carbonate reacts with the magnesium and calcium ions in the hard water to form calcium carbonate and magnesium carbonate that will not react with water

  • Filtration

  • Sodium carbonate displaces the magnesium and calcium ions so the hard water turns soft

Explanation

Question 10 of 16

1

Ion exchange columns contain a resin made of sodium and hydrogen ions

Select one of the following:

  • True
  • False

Explanation

Question 11 of 16

1

How do ion exchange columns work?

Select one of the following:

  • The calcium and magnesium ions attach to the resin and the water no longer contains any ions

  • The hard water is passed through the exchange column. The calcium and magnesium ions become attached to the resin and the sodium and hydrogen ions take their place in the water. These ions do not react with soap

Explanation

Question 12 of 16

1

What methods are used to treat water

Select one of the following:

  • Sedimentation and filtration to remove solids

  • Evaporation and distillation

Explanation

Question 13 of 16

1

Why is chlorine used in the treatment of water

Select one of the following:

  • Because it is a law

  • Because chlorine kills microbes in the water

Explanation

Question 14 of 16

1

What are the issues with using chlorine to treat water?

Select one of the following:

  • It is poisonous and can produce toxic compounds

  • It is very expensive

Explanation

Question 15 of 16

1

Why is fluoride added to water?

Select one of the following:

  • To prevent tooth decay

  • It is added by the government to control the population

  • To help prevent heart disease

Explanation

Question 16 of 16

1

Some people think that you should be able to choose whether or not to have fluoride in your water

Select one of the following:

  • True
  • False

Explanation

Previous
Next