Buckminsterfullerene is an allotropic form of

What happens when (Give equations also):
$(i)$ Methane reacts with excess of chlorine in the presence of diffused sunlight.
$(ii)$ Ethanol undergoes combustion.
$(iii)$ Ethyl alcohol reacts with acidified potassium dichromate.

What is the common name of ethanoic acid?

State whether the following statement is true or false:
Scum is formed due to the reaction of soap with calcium and magnesium salts present in hard water.

Which aldehyde compound does not contain an alkyl group?

The heteroatoms present in $CH_{3}-CH_{2}-O-CH_{2}-CH_{2}Cl$ are:
$(i)$ oxygen
$(ii)$ carbon
$(iii)$ hydrogen
$(iv)$ chlorine