(a) Giving their structures, state the number of single bonds, double bonds and triple bonds (if any) in the following compounds:
(i) ethyne
(ii) ethene
(iii) benzene
(b) Write the molecular formula and structure of cyclohexane. How many covalent bonds are there in a molecule of cyclohexane?
(i) ethyne
(ii) ethene
(iii) benzene
(b) Write the molecular formula and structure of cyclohexane. How many covalent bonds are there in a molecule of cyclohexane?
(a) Structure and type of bond present in given compounds:
(i) Structure of ethyne (C2H2) is as follows:
Ethyne is an aliphatic unsaturated hydrocarbon having two carbon atoms.
Ethyne has one triple bond between its carbon atoms and two single bonds between its carbon and hydrogen atoms.
(ii) Structure of ethene (C2H4) is as follows:
Ethene is an aliphatic unsaturated hydrocarbon having two carbon atoms.
Ethene has a double bond between its carbon atoms and four single bonds between its carbon and hydrogen atoms.
(iii) Structure of benzene (C6H6) is as follows:
Benzene is an aromatic hydrocarbon having six carbon atoms.
A benzene molecule has three carbon-carbon double bonds, three carbon-carbon single bonds, and six carbon-hydrogen single bonds.
(b) Molecular formula of cyclohexane
The molecular formula of cyclohexane is C6H12
Its structure is as follows:
A cyclohexane molecule has six carbon-carbon single bonds and twelve carbon-hydrogen single bonds. Therefore, there are 18 covalent bonds in one molecule of cyclohexane.
(a) Structure and type of bond present in given compounds:
(i) Structure of ethyne (C2H2) is as follows:
Ethyne is an aliphatic unsaturated hydrocarbon having two carbon atoms.
Ethyne has one triple bond between its carbon atoms and two single bonds between its carbon and hydrogen atoms.
(ii) Structure of ethene (C2H4) is as follows:
Ethene is an aliphatic unsaturated hydrocarbon having two carbon atoms.
Ethene has a double bond between its carbon atoms and four single bonds between its carbon and hydrogen atoms.
(iii) Structure of benzene (C6H6) is as follows:
Benzene is an aromatic hydrocarbon having six carbon atoms.
A benzene molecule has three carbon-carbon double bonds, three carbon-carbon single bonds, and six carbon-hydrogen single bonds.
(b) Molecular formula of cyclohexane
The molecular formula of cyclohexane is C6H12
Its structure is as follows:
A cyclohexane molecule has six carbon-carbon single bonds and twelve carbon-hydrogen single bonds. Therefore, there are 18 covalent bonds in one molecule of cyclohexane.
