A-LevelChemistryHydroxy compoundsFeb/Mar 2024Paper 1 Q311 Mark
X is an organic compound containing the elements carbon, hydrogen and oxygen only. The table shows the observations made from three chemical tests carried out on X. reagent added: Na(s), observation: effervescence reagent added: Na₂CO₃(s), observation: effervescence reagent added: hot H⁺/Cr₂O₇²⁻(aq), observation: remains orange What is a possible structure of X?
Askeletal formula of HOOC-COOH
Bskeletal formula of HOCH₂COOH
Cskeletal formula of OHC-COOH
Dskeletal formula of 2-hydroxy-2-methylpropanoic acid (C(CH3)2(OH)COOH)
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of hydroxy compounds within the Chemistrysyllabus. The examiner's mark scheme requires...
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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...
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