Experimental design — Paper 1 · IGCSE Sciences - Co-ordinated (Double) 0654

25 It is suggested that the colour of a dye fades over time because sunlight causes the dye to react with oxygen. black black black black box box box box sunlight RN 4 — air pure pure WA ( nitrogen \\ oxygen dyed black Ned Wy ed Wy ed window _ cloth curtain cloth cloth cloth 1 2 3 4 Which of the experiments shown would help test this suggestion? Kx \ low << & <a S44 A In 0 Oo WwW PY a CS

1 marks

Answer: A

This question in 0654/11 May/June 2007

10 A student placed four sets of seeds in different conditions. Which set of conditions must be kept constant to show the effect of temperature on germination? A temperature and water only B temperature only C temperature, water and oxygen D water and oxygen only

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2008

20 The diagram shows an experiment to test the hardness of separate samples of distilled water, tap water and boiled tap water. teat pipette soap solution 25 cm3 of the water being tested Soap solution is added, shaking after each drop, until a lather is formed. Which results could be correct? number of drops of soap solution used distilled water tap water boiled tap water A 2 5 10 B 2 10 5 C 5 10 2 D 10 5 2

1 marks

Answer: B

This question in 0654/11 May/June 2009

5 Why is a leaf first dipped into hot water when performing the starch test? A to make its membranes permeable B to make starch soluble C to remove air from intercellular spaces D to remove chlorophyll

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2011

21 The apparatus below is used to investigate the speed of a chemical reaction. For which reaction is the apparatus suitable? A gas E + gas F → liquid G only B solid H + solution I → solution J only C solid K + solution L → solution M + gas N D solution P + solution Q → solid R + solution Q

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2013

18 The diagram shows apparatus used to investigate the speed of a reaction. Which other item is essential for this investigation? A a Bunsen burner B a measuring cylinder C a stopclock D a thermometer

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2013

18 A pupil wants to find out if the reaction of 25 cm3 of an acid with 25 cm3 of an alkali is exothermic. Which two pieces of apparatus are needed? A balance and measuring cylinder B Bunsen burner and measuring cylinder C Bunsen burner and thermometer D thermometer and measuring cylinder

1 marks

Answer: D

This question in 0654/11 May/June 2014

19 A pupil wants to find out if the reaction of 25 cm3 of an acid with 25 cm3 of an alkali is exothermic. Which two pieces of apparatus are needed? A balance and measuring cylinder B Bunsen burner and measuring cylinder C Bunsen burner and thermometer D thermometer and measuring cylinder

1 marks

Answer: D

This question in 0654/13 May/June 2014

22 Hydrochloric acid reacts with excess solid sodium carbonate to form sodium chloride, water and carbon dioxide gas. Which method is used to investigate the speed of this reaction? A Measure the pH of the reaction mixture after 10 minutes. B Measure the time taken for all of the solid to dissolve. C Measure the total volume of gas produced. D Measure the volume of gas produced every minute.

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2015

30 A student pours liquid into a measuring cylinder. 100 measuring 90 cylinder 80 70 60 50 liquid 40 digital balance 30 20 10 The student records the volume of the liquid from the scale on the measuring cylinder. He then puts the measuring cylinder containing the liquid on a balance and records the mass. What else needs to be measured before the density of the liquid can be calculated? A the depth of the liquid in the measuring cylinder B the mass of the empty measuring cylinder C the temperature of the liquid in the measuring cylinder D the volume of the empty measuring cylinder

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2015

11 A student placed four sets of seeds in different conditions. Which set of conditions must be kept constant to show the effect of temperature on germination? A temperature and water only B temperature only C temperature, water and oxygen D water and oxygen only

1 marks

Answer: D

This question in 0654/11 May/June 2016

11 A student placed four sets of seeds in different conditions. Which set of conditions must be kept constant to show the effect of temperature on germination? A temperature and water only B temperature only C temperature, water and oxygen D water and oxygen only

1 marks

Answer: D

This question in 0654/12 May/June 2016

11 A student placed four sets of seeds in different conditions. Which set of conditions must be kept constant to show the effect of temperature on germination? A temperature and water only B temperature only C temperature, water and oxygen D water and oxygen only

1 marks

Answer: D

This question in 0654/13 May/June 2016

19 Solid calcium carbonate reacts with dilute hydrochloric acid to produce aqueous calcium chloride, carbon dioxide and water. Which apparatus can be used with a stopwatch to measure the speed of this reaction? cotton wool digital balance 1 measuring cylinder water gas syringe 2 3 A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2016

15 An aqueous salt solution contains an insoluble impurity. Which processes are used to obtain pure salt crystals? A distillation then crystallisation B distillation then chromatography C filtration then crystallisation D filtration then chromatography

1 marks

Answer: C

This question in 0654/12 Oct/Nov 2020

15 Which piece of apparatus is used to measure exactly 15.7 cm3 of a liquid? A burette B pipette C 10 cm3 measuring cylinder D 20 cm3 measuring cylinder

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2020

5 The rate of photosynthesis was measured by counting the number of bubbles of oxygen produced by a submerged aquatic plant at different light intensities as shown. water aquatic plant Which two variables need to be kept constant? A size of plant used and temperature of the water B light intensity and size of the boiling tube C size of plant used and size of the boiling tube D temperature of the water and light intensity

1 marks

Answer: A

This question in 0654/12 Feb/March 2021

14 Which piece of apparatus is used to measure the change in the volume of a liquid most accurately? A B C D

1 marks

Answer: C

This question in 0654/12 May/June 2022

14 Which piece of apparatus is used to measure the change in the volume of a liquid most accurately? A B C D

1 marks

Answer: C

This question in 0654/13 May/June 2022

14 An aqueous salt solution contains an insoluble impurity. Which processes are used to obtain pure salt crystals? A distillation then crystallisation B distillation then chromatography C filtration then crystallisation D filtration then chromatography

1 marks

Answer: C

This question in 0654/11 May/June 2023

5 The rate of photosynthesis of an aquatic plant is measured by counting the number of bubbles of oxygen produced every minute, as shown. The rate is measured at different light intensities. boiling tube water aquatic plant Which two variables need to be kept constant? A size of plant and temperature of the water B light intensity and size of the boiling tube C size of plant and size of the boiling tube D temperature of the water and light intensity

1 marks

Answer: A

This question in 0654/11 May/June 2024

18 Hydrogen gas is given off when zinc reacts with dilute sulfuric acid. Which piece of apparatus is used to collect the hydrogen gas and measure its volume? A balance B gas syringe C pipette D test-tube

1 marks

Answer: B

This question in 0654/12 May/June 2024

18 Hydrogen gas is given off when zinc reacts with dilute sulfuric acid. Which piece of apparatus is used to collect the hydrogen gas and measure its volume? A balance B gas syringe C pipette D test-tube

1 marks

Answer: B

This question in 0654/13 May/June 2024

14 Astudent adds 5g of magnesium ribbon to 20 cm? of dilute hydrochloric acid in a beaker. The student measures how long it takes for the effervescence to stop. Which pieces of apparatus does the student use in this experiment? balance vevlinder stop-clock | thermometer A Jv Jv x Jv B Jv x J Jv Cc Jv Jv J x D x Jv J Jv key / = uses the apparatus X = does not use the apparatus

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2024

14 Calcium carbonate reacts with dilute hydrochloric acid in a flask. The reaction releases carbon dioxide gas. The decrease in the mass of the flask and its contents is measured over time. Which pieces of apparatus must be used? 1 balance 2 pipette 3 thermometer 4 stop-clock A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2024

14 Calcium carbonate reacts with dilute hydrochloric acid in a flask. The reaction releases carbon dioxide gas. The decrease in the mass of the flask and its contents is measured over time. Which pieces of apparatus must be used? 1 balance 2 pipette 3 thermometer 4 stop-clock A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2024