Organic chemistry: Cyclic Hydrocarbons Quiz 7

written by gogorabei | June 10, 2023

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#1. (6) Which of the following statements support that the six electrons of carbon atoms delocalize in aromatic benzene ?

(a) The aromatic benzene reacts by addition and substitution.

(a) The aromatic benzene reacts by addition and substitution.

(b) AH of combustion reaction is higher than AH of hydrogenation reaction.

(b) AH of combustion reaction is higher than AH of hydrogenation reaction.

(C) The bond length between the carbon atoms are intermediate between the length of single and double bonds.

(C) The bond length between the carbon atoms are intermediate between the length of single and double bonds.

(d) (a) and (b).

(d) (a) and (b).

#2. (8) The first member of the aromatic compounds and that of fatty compounds are respectively.

(a) ethene, cyclohexane

(a) ethene, cyclohexane

(b) Aromatic benzene, methane

(b) Aromatic benzene, methane

(c) aromatic benzene, ethyne

(c) aromatic benzene, ethyne

(d) methane, ethane

(d) methane, ethane

#3. (9) The fuel used in car engines is called

(a) aromatic benzene.

(a) aromatic benzene.

(b) naphthaline.

(b) naphthaline.

(c) Gasoline.

(c) Gasoline.

(d) cyclohexane.

(d) cyclohexane.