AP BIOLOGY

Detailed explanation-1: -Hydrocarbons having at least one triple bond between two carbon atoms are known as alkyne. General formula of alkyne is CnH2n−2. As in case of alkene, minimum two carbon atoms are required to form alkyne.

Detailed explanation-2: -The general molecular formula of alkane for straight and branched-chain alkanes is CnH2n+2 and that of cyclic alkanes is CnH2n. For example in the diagram, the four hydrocarbon molecules contain 8 carbon atoms each.

Detailed explanation-3: -The general formula for alkanes is CnH2n+2, where n stands for number of carbon atoms and 2n+2 for number of hydrogen atoms in the molecule.In alkanes, tetrahedra are joined together in which C-C and C-H bond lengths are 154 pm and 112 pm respectively (Unit 12).

Detailed explanation-4: -Alkynes are hydrocarbons which contain carbon-carbon triple bonds. Their general formula is CnH2n-2 for molecules with one triple bond (and no rings).