31. M/J 2015/P12/Q39
Which statement about the properties of the four alkanes from methane to butane is not correct?
A Successive members of the series differ in formula by CH2.
B They increase in boiling point.
C They increase in viscosity.
D They share the same empirical formula
Answer: D
Explaination
All alkanes are saturated hydrocarbonand all their members differ from each other by CH2. They all have same general formula CnH2n+2. Their boiling point, melting point, viscosity increases down the series from small alkane HC to large alkane HC. They all have different molecular formula so their empirical formula also differ.
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