The Fischer-Tropsch process is used for the manufacture of

The reaction of $n$-butane with bromine in the presence of light at $725\,^oC$ yields ...................

Choose the chain terminating step.
$(1)$ $H_2 \to H^{\bullet} + H^{\bullet}$
$(2)$ $Br_2 \to Br^{\bullet} + Br^{\bullet}$
$(3)$ $Br^{\bullet} + HBr \to H^{\bullet} + Br_2$
$(4)$ $H^{\bullet} + Br_2 \to HBr + Br^{\bullet}$
$(5)$ $Br^{\bullet} + Br^{\bullet} \to Br_2$

Explain why the boiling point and melting point of alkanes increase with an increase in molecular weight.

Knocking sound occurs in an engine when fuel:

What is the number of $-CH_2-$ groups present in dodecane?