Drugs and their effects: past paper questions
Real questions on drugs and their effects
The newest 20 of 27 written questions, plus 18 multiple-choice. Open one to see it on the real paper.
- 5129/32 · May/June 2025 · Q2b(i)[2]
The results are shown in Table 2.1. mass of empty glass tube / g 29.0 mass of glass tube and powdered copper before heating / g 34.9 mass of glass tube and black solid after heating / g 35.1 mass of powdered copper before heating / g mass of the black solid in the glass tube after heating / g increase in the mass of th...
See it on the paper → - 5129/22 · May/June 2024 · Q3c[2]
Describe a test and the result of the test that shows the presence of bromide ions in solution. test result
See it on the paper → - 5129/22 · May/June 2024 · Q15a(i)[2]
Complete the word equation for the reaction. ammonium + sodium + + water
See it on the paper → - 5129/31 · May/June 2024 · Q2a(ii)[2]
State two observations that show that the magnesium carbonate has been added in excess. observation observation
See it on the paper → - 5129/31 · May/June 2024 · Q2a(iii)[1]
Name the process that the student uses to separate the excess magnesium carbonate from the mixture.
See it on the paper → - 5129/31 · May/June 2024 · Q2a(iv)[1]
Explain how the student knows that the mixture has been heated for long enough.
See it on the paper → - 5129/31 · May/June 2024 · Q2a(v)[2]
Describe what the student needs to do after heating the separated mixture in order to obtain pure crystals.
See it on the paper → - 5129/31 · May/June 2024 · Q2b(i)[1]
The student has: • • • • • • • insoluble lead carbonate solid insoluble barium oxide solid lead metal aqueous lead nitrate dilute sulfuric acid aqueous sodium sulfate insoluble barium sulfate. Select two chemicals from the list which are suitable for the student to use to make lead sulfate.
See it on the paper → - 5129/31 · May/June 2024 · Q2b(ii)[2]
State two reasons why the method used for making magnesium sulfate is not suitable for making lead sulfate. reason reason
See it on the paper → - 5129/31 · May/June 2024 · Q2b(iii)[1]
Name the method used for making lead sulfate.
See it on the paper → - 5129/32 · May/June 2024 · Q1a(iii)[2]
Describe the appearance of the contents of the flask when excess solid copper( II ) oxide has been added.
See it on the paper → - 5129/22 · May/June 2023 · Q5[4]
Use words from the list to complete the sentences. endothermic oxidation reduction exothermic hydrogen saturated unsaturated water Each word can be used once, more than once or not at all. Chemical energy is transferred to thermal energy in the surroundings by reactions. Alkanes are hydrocarbons. The loss of oxygen in...
See it on the paper → - 5129/22 · May/June 2023 · Q8a[3]
Complete the sentences about enzymes by writing appropriate words in the spaces. Enzymes are biological catalysts. They are made of a special type of molecule. An example of a human enzyme found in the digestive system is . The area on a chromosome which codes for an enzyme is called a .
See it on the paper → - 5129/22 · May/June 2023 · Q8b[1]
Fig. 8.1 shows an incomplete substrate molecule and the enzyme which acts on it. active site enzyme substrate Fig. 8.1 Complete the diagram of the substrate molecule by drawing in the circle on the substrate.
See it on the paper → - 5129/22 · May/June 2023 · Q8c[2]
Explain why enzymes found in the human body do not function when they are heated to 60 °C.
See it on the paper → - 5129/21 · May/June 2022 · Q17a[2]
Complete the word equation for the reaction between magnesium and sulfuric acid. magnesium + sulfuric acid +
See it on the paper → - 5129/21 · May/June 2022 · Q17b[1]
Suggest a piece of apparatus that could be used to remove the excess magnesium at the end of the reaction.
See it on the paper → - 5129/21 · May/June 2022 · Q17c[1]
State the name of the type of reaction that gives out heat energy.
See it on the paper → - 5129/21 · May/June 2022 · Q17d[1]
Describe what happens to the pH of the reaction mixture during the reaction.
See it on the paper → - 5129/21 · May/June 2022 · Q18a[2]
Fig. 18.1 shows a permanent magnet on a float on the surface of a bowl of water. magnet water N float S Fig. 18.1 A student slowly rotates the magnet and float on the surface of the water to the position shown in Fig. 18.2. magnet water S N float Fig. 18.2 The student releases the magnet and float and they slowly rotat...
See it on the paper →
What examiners said
The most common misconception was that the loss of oxygen is oxidation. Stronger candidates were more likely to distinguish correctly between exothermic and endothermic and also between saturated and unsaturated.
— Examiner report, May/June 2023, 5129/22 Q5 (Cambridge)
Most candidates were able to name an enzyme in the digestive system. Very few candidates knew that an enzyme is a protein molecule and that a gene is the area on a chromosome that codes for an enzyme. The common error was DNA instead of gene.
— Examiner report, May/June 2023, 5129/22 Q8(a) (Cambridge)
The lock and key mechanism to explain enzyme action is new to the syllabus. However, most of the stronger candidates were able to draw a correct diagram.
— Examiner report, May/June 2023, 5129/22 Q8(b) (Cambridge)
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