Preparation of amines Quiz
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5 questions, one answer each
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1. Which conditions turn 1-bromopropane into propylamine?
- A. Aqueous NaOH, reflux
- B. Excess ethanolic ammonia, sealed tube, heat
- C. Tin and concentrated HCl
- D. Dilute H₂SO₄, reflux
2. What is the main disadvantage of making a primary amine from a halogenoalkane and ammonia?
- A. The product is a gas
- B. Further substitution gives a mixture of amines and salts
- C. The reaction is explosive
- D. The ammonia is used up as a catalyst
3. Which reagent reduces a nitrile to a primary amine?
- A. LiAlH₄ in dry ether
- B. Dilute HCl, reflux
- C. Acidified K₂Cr₂O₇
- D. Aqueous NaOH
4. How many [H] are needed to reduce C₆H₅NO₂ to C₆H₅NH₂?
- A. 2
- B. 4
- C. 6
- D. 8
5. In the reduction of nitrobenzene with Sn and HCl, why is NaOH added at the end?
- A. To reduce the amine further
- B. To release phenylamine from C₆H₅NH₃⁺
- C. To oxidise the tin
- D. To dissolve the nitrobenzene