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SingaporeChemistryQuick questions
Analytical Techniques
Quick questions on Structure determination combining techniques: Singapore A-Level H2 Chemistry
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is not cross-checking the final structure?Show answer
Always verify the proposed structure accounts for the molecular formula, every spectrum, and the chemical tests.
What is q1?Show answer
State, in order, which property each technique provides in structure determination. [2 marks]
What is q2?Show answer
A compound shows a C=O at cm, a positive 2,4-DNPH test, a negative Tollens test, and a positive tri-iodomethane test. Deduce the functional group and a structural feature. [3 marks]
What is q3?Show answer
Explain why combining carbon-13 NMR with proton NMR gives more information than either alone. [2 marks]
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