Which of the following formulas represents a saturated cyclic compound?

Write a note on aromatization of alkane.

On treating a mixture of two alkyl halides with sodium metal in dry ether,$2-$methylpropane was obtained. The alkyl halides are

Give the decreasing order of reactivity for the halogenation reaction of alkanes.

$Ph-CH=NO_2H$ $\xrightarrow[{3 \ days}]{{isomerises}}$ $\mathop {(x)}\limits_{(50-50\%)}$,Isomer $(x)$ is

Number of bromo derivatives obtained on treating ethane with excess of $Br_2$ in diffused sunlight is $..........$.