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Choose the right technique to separate a mixture

6th grade (Year 7 in England) · 11 questions · Common Core: NGSS.MS-PS1-2 · England: KS3 Chemistry: Pure and impure substances

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Date

Score/ 11

1
Question 1
Which technique is best to separate the fractions in crude oil?
- A. evaporation or crystallisation
- B. filtration
- C. simple distillation
- D. fractional distillation
2
Question 2
Countries such as Saudi Arabia get much of their drinking water from the sea. Which method is used on a large scale?
- A. filtration through sand only
- B. adding more salt
- C. chromatography
- D. desalination by distillation or reverse osmosis
3
Question 3
Which technique is best to separate the fractions in crude oil?
- A. evaporation or crystallisation
- B. filtration
- C. chromatography
- D. fractional distillation
4
Question 4
Why is the filtrate clear after filtering muddy water?
- A. The filter paper adds chemicals
- B. The mud dissolves
- C. Water evaporates
- D. The solid particles are too big to pass through the filter paper
5
Question 5
Which technique is best to separate sand from water?
- A. simple distillation
- B. fractional distillation
- C. chromatography
- D. filtration
6
Question 6
A mixture contains iron filings and sulfur powder. What is the quickest way to separate them?
- A. use chromatography
- B. filter them
- C. distil them
- D. use a magnet
7
Question 7
Which technique is best to separate sand from water?
- A. simple distillation
- B. evaporation or crystallisation
- C. chromatography
- D. filtration
8
Question 8
Countries such as Saudi Arabia get much of their drinking water from the sea. Which method is used on a large scale?
- A. desalination by distillation or reverse osmosis
- B. chromatography
- C. filtration through sand only
- D. adding more salt
9
Question 9
Which technique is best to separate ethanol from a mixture of ethanol and water?
- A. chromatography
- B. fractional distillation
- C. simple distillation
- D. evaporation or crystallisation
10
Question 10
A mixture contains iron filings and sulfur powder. What is the quickest way to separate them?
- A. use chromatography
- B. filter them
- C. use a magnet
- D. distil them
11
Question 11
Which technique is best to separate copper sulfate crystals from its solution?
- A. simple distillation
- B. evaporation or crystallisation
- C. fractional distillation
- D. filtration

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