Write balanced equation for preparation of:

(i) ethane from sodium propionate.

(ii) ethanol from monochloroethane and aq. sodium hydroxide.

Give reasons for:

(i) Methane does not undergo addition reactions, but ethene does.

(ii) Ethyne is more reactive than ethane.

(iii) Hydrocarbons are excellent fuels.

The I.U.P.A.C. name of acetylene is -

A: propane
B: propyne
C: ethene
D: ethyne.