Question

Hydrocarbon X and Y have melting point -190 degree celcius and -90 degree celcius respectively . Which one of these has minimum carbon in the molecule and why?

Answer 1

y has minimum carbon in it because has less calorific value and metals frequently

Answer 2

we know that the larger the number of carbon atoms in hydrocarbons, higher is the melting point. In case of more number of C- atoms forces of attraction between the molecules increases and bonding becomes stronger. Thus the hydrocarbon X having less melting point -190C has less C- atoms than Y having more melting point -90C.