29. M/J 2015/P12/Q34
Which statement about alkanes is correct?
A Alkanes are readily polymerised.
B Alkanes react with bromine by addition.
C Alkanes react with chlorine by substitution.
D Butane has three more carbon atoms and eight more hydrogen atoms than methane.
Answer: C
Explaination
Alkane reacts with halogens by substitution reaction as there is only C-C and C-H single bond. Alkane cannot polymerize or react with each other to form a polymer. Methane CH4 is the first member of alkane family with 1C and 4H atoms whereas butane C4H10 is the fourth member of alkane family with 3 more carbon and 6 more H atoms.
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