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

The reaction of methane with concentrated $HNO_3$ at high temperature yields .........

Cetane is a compound which has very good ignition property. Chemically it is

$X$ is an isomer of $C_6H_{14}$. It has four primary carbons and two tertiary carbons. '$X$' can be prepared from which of the following reactions?

Identify the final product $C$ in the following reaction sequence:
$Br-(CH_2)_5-Br$ $\xrightarrow{Na, \text{D.E.}} A$ $\xrightarrow{Br_2, \Delta} B$ $\xrightarrow{\text{alc. KOH}, \Delta} C$

The reaction of propane with bromine in the presence of $UV$ light predominantly forms