Organic synthesis and reaction pathways Quiz
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5 questions, one answer each
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1. Complete combustion of 0.0100 mol of a hydrocarbon gives 0.0400 mol CO₂. How many carbon atoms are in one molecule?
- A. 4
- B. 2
- C. 3
- D. 8
2. Which reagent turns CH₃CH₂MgBr into propanoic acid after acidification?
- A. Water
- B. Solid carbon dioxide
- C. Propanone
- D. Dilute hydrochloric acid alone
3. Why is a Grignard reaction carried out in dry ether?
- A. Ether is the only solvent that dissolves magnesium
- B. Ether acts as the catalyst
- C. Ether is oxidised to the product
- D. Water would destroy the Grignard reagent
4. A pure sample of a solid is identified by which property?
- A. A high boiling temperature
- B. A sharp melting temperature matching the data value
- C. A pale colour
- D. A low density
5. Which technique separates phenylamine from the reaction mixture without decomposing it?
- A. Simple distillation at 184 °C
- B. Reflux
- C. Steam distillation
- D. Recrystallisation