Which of the following is not a property of aromatic compounds? (A) aromatic rings predominantly are involved in substiution reactions (B) aromatic rings are chemically stable  (C) aromatics are insoulble in water  (B) benzene can go through addition reactions

Polychlorinated Biphenyls (PCBs) are chemicals formed by attaching one or more chlorine atoms to a pair of connected benzene rings.   (a) Summarise the adverse health effects associated with exposure to PCBs.         (b) With a suitable illustration, explain the action of PCBs toxicity.

Give the IUPAC names of structures containing two carbon atoms for the following classes of compounds: (a) ether:  (b) aldehyde: (c) carboxylic acid:  (d) ester:

Write a complete chemical equation showing reactants, products, and catalysts needed (if any) for the following reaction and (2) Draw and name the organic compound found in every reaction.(Use condensed structural formula) (a) Complete hydrogenation of 2-Methylhexa-1,5-diene (b) Complete halogenation (Br2) of 3-Ethyl-2,2-dimethylhept-3-ene(c) Reaction of (4E)-2,4-Dimethylhexa-1,4-diene with a mole of water

A certain hydrocarbon has a molecular formula of C5H8. Which of the following is not a structural possibility for this hydrocarbon: (d) It contains an alkyne O It contains one ring and one double bond (c) It contains two double bonds and no rings O (b) It contains one ring and no double bonds

Draw the hydrogen bonding that takes place between(a) two molecules of ethanol.(b) two molecules of propylamine.(c) a molecule of dimethyl ether and two molecules of water.(d) two molecules of trimethylamine and a molecule of water.

Indicate whether each statement is true or false. (a) Alkanesdo not contain any carbon–carbon multiple bonds.(b) Cyclobutane contains a four-membered ring. (c) Alkenescontain carbon–carbon triple bonds. (d) Alkynes containcarbon–carbon double bonds. (e) Pentane is a saturatedhydrocarbon but 1-pentene is an unsaturated hydrocarbon.(f) Cyclohexane is an aromatic hydrocarbon. (g) The methylgroup contains one less hydrogen atom than methane.

Explain each statement in terms of atomic properties:(a) Carbon engages in covalent rather than ionic bonding.(b) Carbon has four bonds in all its organic compounds.(c) Carbon forms neither stable cations, like many metals, norstable anions, like many nonmetals.(d) Carbon bonds to itself more extensively than does any otherelement.(e) Carbon forms stable multiple bonds

Recognize fused aromatic systems such as polynuclear aromatic hydrocarbons andfused heterocyclic compounds, and use the theory of aromatic compounds to explaintheir properties.

Give the structural formulae and name the functional groups of the following compounds. (a) 3-chlorobut-1-ene Name the functional group: (b) butanedioic acid Name the functional group: (c) propanamide Name the functional group: (d) 3-methylbutanal Name the functional group: