CHAPTER 9
A ROMATIC HYDROCARONS
1. Most common reactions of benzene and its derivatives are:
(a) Electrophilic addition reactions
(b) Electrophilic substitution reactions
(c) Nucleophilic addition reactions
(d) Nucleophilic substitution reactions 2.Benzene + Ozone —If, in this sequence Y is: (a) Benzene monozonide
(b) Benzene diozonide
(c) Benzene triozonide
(d) Succinic acid
3. Which species represents the electrophile in aromatic Nitration:
(a) NO2 (b) NO2+ (c) NO (d) NO3
4. Heating a mixture of Sodium benzoate and soda lime gives:
(a) Benzene (b) Methane
(c) Sodium benzoate (d) Calcium benzoate
5. Which of the following species participate in Sulphonation of benzene ring:
(a) S03-2 (b) S203-2 (c) S03 (d) SO2
6. The compound prepared by electrophilic substitution reaction of benzene is:
(a) Acetophenone (b) Glyoxal
(c) Cyclohexane (d) Hexabromo cyclohexane
7. The term `Aromatic' was derived from:
(a) Greek word (b) Latin (c) Russian
(d) English
8. Which compound was recognized as the parent member of aromatic compounds:
(a) Toluene
(b) Aniline (c) Phenol (d) Benzene
9. Which one of the following is not monocyclic aromatic hydrocarbon:
(a) Benzaldehyde (b) Benzoic acid
(c) Benzene sulphonic acid (d) Anthracene
10. In which one of the following compound rings are not fused together at ortho positions:
(a) Phenanthrene (b) Naphthalene (c) Diphenyemethane (d) Anthracene
11. Toluene is called:
(a) Hydroxyl benzene (b) Methyl benzene
(c) Ethyl benzene (d) None
12. Substituted phenyl groups are called:
(a) Aryl groups (b) Phenyl groups
(c) Acyl groups (d) Alkyl groups
13. Benzene was discovered by Michael Faraday's in:
(a) 1824 (b) 1825 (c) 1826 (d) 1827
14. The empirical formula of Benzene was determined by:
(a) IR spectra (b) U.V
(c) Elemental analysis (d) NMR spectra
15. How many molecules of chlorine add to benzene in the presence of sunlight:
(a) One (b) Two (c) Three (d) None
16. The bond angles in benzene ring are:
(a) 90° (b) 120° (c) 145° (d) None
17. All C-H bond lengths of benzene ring is: (a) 1.07A° (b) 1.09A° (c) 1.08A° (d) None
18. A six membered ring containing one double bond is called:
(a) Cyclohexene (b) Cyclohexane
(c) Benzene (d)None
19. Hybridization of each carbon atom in benzene ring is:
(a) sp (b) sp2 (c) sp3 (d)dsp2