Test
AQA GCSE Chemistry 3.2
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Preguntas del test (20)
1True or false? Using hard water makes it more difficult for soap to lather.
- AVerdadero
- BFalso
2Which of these rocks helps to cause hardness in water?
- AGypsum
- BGranite
- CDolomite
- DCalcite
- EBasalt
3Which type of deposit forms when hard water reacts with soap?
- AScale, calcium carbonate
- BScum, calcium stearate
4Which type of deposit forms when hard water is boiled?
- AScale, calcium carbonate
- BScum, calcium stearate
5True or false? Calcium carbonate dissolves in carbonic acid (rainwater) to produce calcium ions and hydrogencarbonate ions.
- AVerdadero
- BFalso
6Which type of hard water can be softened by heating?
- APermanent hard water
- BTemporary hard water
7True or false? Scale is formed upon heating temporary hard water because calcium hydrogencarbonate forms a precipitate.
- AVerdadero
- BFalso
8Which of these methods can soften either type of hard water?
- AWashing soda
- BBoiling
- CIon-exchange column
9Which ion is exchanged with calcium and magnesium ions in an ion-exchange column?
- APotassium K+
- BSodium Na+
- CCadmium Cd2+
- DIron Fe3+
10True or false? Ion-exchange columns do not need to be regularly washed out with saline solution.
- AVerdadero
- BFalso
11What is the first stage in the water treatment process?
- APassing water through a sand filter for clear water
- BPassing water through metal meshes to remove large objects
- CChlorination of water to kill bacteria
- DAdding aluminium sulphate and lime to encourage flocculation of suspended particles in the water
12What is the second stage in the water treatment process?
- APassing water through a sand filter for clear water
- BPassing water through metal meshes to remove large objects
- CChlorination of water to kill bacteria
- DAdding aluminium sulphate and lime to encourage flocculation of suspended particles in the water
13What is the third stage in the water treatment process?
- APassing water through a sand filter for clear water
- BPassing water through metal meshes to remove large objects
- CChlorination of water to kill bacteria
- DAdding aluminium sulphate and lime to encourage flocculation of suspended particles in the water
14What is the fourth stage in the water treatment process?
- APassing water through a sand filter for clear water
- BPassing water through metal meshes to remove large objects
- CChlorination of water to kill bacteria
- DAdding aluminium sulphate and lime to encourage flocculation of suspended particles in the water
15What is often contained in a filter cartridge?
- AActivated carbon
- BActivated boron
- CIon-exchange column
- DFractionating column
- ESilver
- FRuthenium
16What are health benefits of drinking hard water?
- AReduced risk of heart disease
- BReduced risk of cancer
- CStronger muscles
- DStronger bones and teeth
17Which gas is sometimes used as an alternative to chlorine in killing bacteria?
- AFluorine
- BHydrogen sulphide
- COzone
- DMethane
18Which ion is sometimes added to water to reduce the risk of tooth decay?
- ASulphate, SO42-
- BFluoride, F-
- CNitrate, NO3-
- DPotassium, K+
19Which of these are arguments for the fluoridation of water?
- AReduction in tooth decay
- BIncreased risk of fluorosis
- CProtects people who don't have good dental hygiene
- DImpossible to set safe limits due to varied intake
- EEthical issues of being forced to take a treatment
- FReduced risk of heart disease
20Which of these are arguments against the fluoridation of water?
- AReduction in tooth decay
- BIncreased risk of fluorosis
- CProtects people who do not have good dental hygiene
- DImpossible to set safe limits due to varied intake
- EEthical issues with being forced to take a treatment
- FReduced risk of heart disease
Información
- Descripción
- Twenty questions on the second section of Unit 3 in AQA GCSE Chemistry: Water.
- Autor
- Matthew T
- Idioma
- English
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- 208
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