Which of the following has the highest boiling point?

Identify the correct statements from the following:
$(i)$ Petrol and $CNG$ operated automobiles cause less pollution.
$(ii)$ Alkanes having tertiary hydrogen can be oxidised to alcohols by $KMnO_4$.
$(iii)$ Methane can be prepared by Kolbe's electrolytic method.
$(iv)$ Alkyl chloride on reduction with zinc and dilute hydrochloric acid gives alkane.

What are $Y$ and $Z$ in the following reaction sequence?

What does petroleum mainly consist of?

Anhydrous sodium acetate on heating with sodalime gives

The main constituent of marsh gas is: