A-LevelChemistryHydroxy compoundsOct/Nov 2015Paper 1 Q251 Mark
Compound X has been investigated for use as an artificial sweetener. [Figure of compound X, a glucose derivative with two -Cl and multiple -OH groups] The two C-Cl bonds can be hydrolysed by hot NaOH(aq). The C-O-C bonds cannot be hydrolysed by hot NaOH(aq). What are the numbers of specified types of –OH groups before and after hydrolysing the two C-Cl bonds?
Abefore hydrolysis: secondary: 0, primary: 1, after hydrolysis: secondary: 2, tertiary: 4
Bbefore hydrolysis: secondary: 0, primary: 2, after hydrolysis: secondary: 1, tertiary: 4
Cbefore hydrolysis: secondary: 4, primary: 1, after hydrolysis: secondary: 5, tertiary: 1
Dbefore hydrolysis: secondary: 4, primary: 2, after hydrolysis: secondary: 4, tertiary: 1
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of hydroxy compounds within the Chemistrysyllabus. 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