A-LevelBiologyBiological moleculesMay/June 2018Paper 1 Q61 Mark
A student was asked to estimate the concentration of glucose in a solution using the Benedict's test. The student was provided with a 1.0 mol dm⁻³ glucose solution and was told to make a 0.6 mol dm⁻³ solution by proportional dilution. Which row shows the correct volumes of both 1.0 mol dm⁻³ glucose solution and distilled water needed to make the 0.6 mol dm⁻³ solution?
Avolume of 1.0 mol dm⁻³ glucose solution/cm³ 12, volume of distilled water/cm³ 8
Bvolume of 1.0 mol dm⁻³ glucose solution/cm³ 10, volume of distilled water/cm³ 10
Cvolume of 1.0 mol dm⁻³ glucose solution/cm³ 8, volume of distilled water/cm³ 12
Dvolume of 1.0 mol dm⁻³ glucose solution/cm³ 6, volume of distilled water/cm³ 14
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of biological molecules within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep