Criteria of purity — Paper 1 · IGCSE Physical Science 0652

1 Diagram 1 shows the paper chromatogram of substance X. red yellow X diagram 1 Diagram 2 shows the cooling curve for substance Y. temperature / °C 147 0 0 time diagram 2 Which statement about X and Y is correct? A X is a mixture and Y is a pure substance. B X is a pure substance and Y is a mixture. C X and Y are mixtures. D X and Y are pure substances.

1 marks

Answer: A

This question in 0652/11 Oct/Nov 2008

1 The diagram shows the results of a chromatography experiment. U V W X Y Z Which pair of substances are pure substances? A U and X B U and Z C V and W D W and Y

1 marks

Answer: B

This question in 0652/11 Oct/Nov 2013

1 The diagram shows the results of a chromatography experiment. U V W X Y Z Which pair of substances are pure substances? A U and X B U and Z C V and W D W and Y

1 marks

Answer: B

This question in 0652/12 Oct/Nov 2013

1 A substance was heated until it completely melted. The substance began melting when the temperature reached 120 °C and continued melting until the temperature reached 123 °C. What is the substance? A a compound B a metal C a mixture D an element

1 marks

Answer: C

This question in 0652/11 Oct/Nov 2014

1 A substance was heated until it completely melted. The substance began melting when the temperature reached 120 °C and continued melting until the temperature reached 123 °C. What is the substance? A a compound B a metal C a mixture D an element

1 marks

Answer: C

This question in 0652/12 Oct/Nov 2014

3 A bottle of a solid is labelled as shown. CITRIC ACID (anhydrous) melting point: 153 °C The melting point of a sample from the bottle is measured. The sample melts over a temperature range from 140 °C to 150 °C. Which statement explains this observation? A The sample contains a mixture of citric acid and other solids. B The sample is too large. C The sample has a pH less than 7. D The sample is too small.

1 marks

Answer: A

This question in 0652/11 Oct/Nov 2016

2 The chromatogram of black ink and three coloured dyes, X, Y and Z, is shown. black X Y Z ink Which colours make up the black ink? A X and Y only B X and Z only C X, Y and Z D Z only

1 marks

Answer: B

This question in 0652/12 Oct/Nov 2016

3 A bottle of a solid is labelled as shown. CITRIC ACID (anhydrous) melting point: 153 °C The melting point of a sample from the bottle is measured. The sample melts over a temperature range from 140 °C to 150 °C. Which statement explains this observation? A The sample contains a mixture of citric acid and other solids. B The sample is too large. C The sample has a pH less than 7. D The sample is too small.

1 marks

Answer: A

This question in 0652/12 Oct/Nov 2016

2 The diagram shows a chromatogram of several different inks. X 1 2 3 Which statement is correct? A 2 is a pure substance. B 3 is a pure substance. C X is a mixture of 1 and 2. D X is a mixture of 2 and 3.

1 marks

Answer: B

This question in 0652/12 Oct/Nov 2019

2 A bottle of a solid is labelled as shown. CITRIC ACID (anhydrous) melting point: 153 C The melting point of a sample from the bottle is measured. The sample melts over a temperature range from 140 C to 150 C. Which statement explains this observation? A The sample contains a mixture of citric acid and other solids. B The sample is too large. C The sample has a pH less than 7. D The sample is too small.

1 marks

Answer: A

This question in 0652/11 Oct/Nov 2020

1 The chromatogram of a black ink and three coloured dyes, X, Y and Z, is shown. black X Y Z ink Which colours make up the black ink? A X and Y only B X and Z only C X, Y and Z D Z only

1 marks

Answer: B

This question in 0652/11 Oct/Nov 2022