27. O/N 2015/P12/Q37
The structures of three hydrocarbons from the same homologous series are shown
Which statement is correct?
A All three molecules are unsaturated hydrocarbons.
B All three molecules have the same empirical formula.
C W has the lowest boiling point.
D X is an isomer of Y.
Answer: C
Explaination
All three are the structures of alkane family. They all are saturated hydrocarbon (C-C and C-H single bond). They all have different molecular formula (number of atoms) so they are not isomers of each other and their empirical formula will not be same. Molecule X and Y are two different molecules as there is no similarity in number of atoms. Molecule W has the lowest boiling point because of small molecular size.
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