Which of the following has an octane number of zero?

The most important method of preparation of hydrocarbons of lower carbon number is

Hexane yields different products under different conditions. Provide three such reactions.

Identify the correct catalyst and reaction conditions for the controlled oxidation of methane to $(i)$ methanol $(X)$, $(ii)$ methanal $(Y)$ and ethane to $(iii)$ ethanoic acid $(Z)$.

When a mixture of methane and oxygen is passed over heated molybdenum oxide, the product obtained is ........ .

Which among the following has the lowest boiling point?