18B.2 Preparing amines and amides Quiz: Pearson Edexcel Chemistry, Unit 18

The 20 questions

1. Which metal is used with concentrated hydrochloric acid to reduce nitrobenzene to phenylamine?

   • Copper
   • Zinc
   • Iron
   • Tin

2. What is the product of reducing nitrobenzene with tin and concentrated hydrochloric acid, followed by alkali?

   • Phenol, C6H5OH
   • Phenylamine, C6H5NH2
   • Benzoic acid, C6H5COOH
   • Benzene-1,4-diamine

3. Which reagent converts a halogenoalkane directly into a primary amine?

   • Potassium cyanide
   • Dilute nitric acid
   • Ethanolic ammonia
   • Aqueous sodium hydroxide

4. What organic product is formed when an acyl chloride reacts with a primary amine?

   • Secondary amine
   • N-substituted amide
   • Carboxylic acid
   • Nitrile

5. Which compound is a primary amine?

   • Ethanamide, CH3CONH2
   • Trimethylamine, (CH3)3N
   • Propan-1-amine, CH3CH2CH2NH2
   • N-methylethanamine, CH3NHCH2CH3

6. Calculate the relative molecular mass of phenylamine, C6H7N, using Ar: C 12, H 1, N 14.

   • 94
   • 77
   • 107
   • 93

7. What is the by-product when ethanoyl chloride reacts with ammonia to form an amide?

   • Sodium chloride
   • Water
   • Ammonium chloride
   • Ethanoic acid

8. Which reagent is used alongside hydrogen gas to reduce nitriles to primary amines?

   • Nickel catalyst
   • Sodium hydroxide
   • Sulfuric acid
   • Potassium manganate

9. Calculate the relative molecular mass of N-butylethanamide, C6H13NO, using Ar: C 12, H 1, N 14, O 16.

   • 113
   • 115
   • 129
   • 101

10. Which amide forms from ethanoyl chloride and methylamine?

    • N-methylethanoate, CH3COOCH3
    • Ethanenitrile, CH3CN
    • Methylethanamine, CH3CH2NHCH3
    • N-methylethanamide, CH3CONHCH3

11. What is the main role of hydrochloric acid in the tin reduction of nitrobenzene?

    • Oxidises the tin
    • Dehydrates the product
    • Provides hydrogen ions
    • Acts as catalyst

12. Which functional group is reduced to a primary amine using tin and concentrated hydrochloric acid?

    • Nitrile group
    • Carbonyl group
    • Amide group
    • Nitro group

13. Why is excess ammonia used when preparing a primary amine from a halogenoalkane?

    • Prevents amine oxidation
    • Increases activation energy
    • Prevents further substitution
    • Increases reaction temperature

14. Why is sodium hydroxide added after reducing nitrobenzene with tin and hydrochloric acid?

    • Precipitate the tin
    • Oxidise phenylamine
    • Neutralise unreacted nitrobenzene
    • Liberate free amine

15. Why are acyl chlorides preferred over carboxylic acids when preparing amides?

    • Less toxic
    • Higher boiling point
    • More reactive
    • Cheaper reagents

16. Calculate the mass of phenylamine from 0.0200 mol of nitrobenzene at 100% yield, using Mr = 93 for phenylamine.

    • 3.72 g
    • 0.93 g
    • 2.46 g
    • 1.86 g

17. Which reagent mixture is used to reduce butanenitrile to butylamine?

    • Tin and HCl
    • LiAlH4 in ether
    • NaBH4 in ethanol
    • Acidified KMnO4

18. Why does using aqueous ammonia rather than concentrated ammonia lower amide yield?

    • Acyl chloride polymerises
    • Ammonia evaporates rapidly
    • Acyl chloride hydrolyses
    • Amide decomposes quickly

19. For ethanoyl chloride with excess ammonia, how many moles of ammonia are needed per mole of amide formed?

    • 0.5
    • 2
    • 1
    • 3

20. What is the relative molecular mass of 1-bromobutane, C4H9Br, using Ar: C 12, H 1, Br 79.9?

    • 152.9
    • 120.9
    • 135.0
    • 136.9

Related quizzes

• Bonding and stability of benzene Quiz · 18A.1 · 20 questions
• Electrophilic substitution of benzene Quiz · 18A.2 · 20 questions
• Phenol and its bromination Quiz · 18A.3 · 20 questions
• Amines: identification, basicity and reactions Quiz · 18B.1 · 20 questions
• Polyamides and amino acids Quiz · 18B.3 · 20 questions
• Proteins and the peptide bond Quiz · 18B.4 · 20 questions
• Deducing formulae from data Quiz · 18C.1 · 20 questions
• Planning multi-step reaction schemes Quiz · 18C.2 · 20 questions
• Practical preparation and purification Quiz · 18C.3 · 20 questions
• Sub-atomic particles, isotopes and relative masses Quiz · 1.1.1 · 20 questions