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Quiz

AS Level questions — Lesson 4: Aromatic Hydrocarbons and Benzene Chemistry

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1.
Study the scheme. Which option is correct?
(B): benzoic acid, (A): methylbenzene
(B): benzoic acid, (A): ethylbenzene
(B): phenylethanoic acid, (A): ethylbenzene
(B): phenol, (A): ethylbenzene
2.
Starting from 20 g of C₆H₆ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
mass of C₆H₂Br₃OH = 51.6 g, overall yield = 60.8%
mass of C₆H₂Br₃OH = 68.7 g, overall yield = 70.8%
mass of C₆H₂Br₃OH = 51.6 g, overall yield = 70.8%
mass of C₆H₂Br₃OH = 68.7 g, overall yield = 60.8%
3.
Which reagents/conditions bring about the conversion shown?
Cl₂ / UV
CH₃COCl / AlCl₃
HNO₃ conc. / H₂SO₄ conc. 50°C
H₂SO₄ conc.
4.
The table gives enthalpies of hydrogenation. Calculate the delocalisation (resonance) energy of benzene.
205 kJ/mol
354 kJ/mol
31 kJ/mol
149 kJ/mol
5.
Starting from 5.6 g of C₆H₆ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
mass of C₆H₅NH₂ = 3.15 g, overall yield = 56.2%
mass of C₆H₅NH₂ = 3.76 g, overall yield = 75%
mass of C₆H₅NH₂ = 3.15 g, overall yield = 75%
mass of C₆H₅NH₂ = 3.76 g, overall yield = 56.2%
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