Halogenation of alkanes is:

The decreasing order of boiling points of the following alkanes is:
$(a)$ Heptane
$(b)$ Butane
$(c)$ $2-$methylbutane
$(d)$ $2-$methylpropane
$(e)$ Hexane
Choose the correct answer from the options given below:

Which branched chain isomer of the hydrocarbon with molecular mass $72 \ u$ gives only one isomer of mono-substituted alkyl halide?

What effect does branching of an alkane chain have on its boiling point?

Which reagent will be used in the following process?
$CH_3-CH_2-CH_2-CH_3 \rightarrow CH_3-CH_2-CH_2-CH_2-Cl + CH_3-CH_2-CHCl-CH_3$

The major product of which of the following reactions will not decolorize $Br_2 + H_2O$?