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

In paraffins,with the increasing molecular weight,it is found that

Which is the correct option for the following reaction?
$ 2 CH_3 CH_2 Br \xrightarrow{2 Na / \text{Dry ether}} ? $

In the given reaction,product $B$ is:
Cyclohexane $\xrightarrow{Br_2, h\nu}$ $(A) \xrightarrow{Na, \text{dry ether}}$ $(B)$

$RMgI$ when treated with ice-cold water liberated a gas which occupied $1.4 \text{ dm}^3/\text{g}$ at $STP$. The gas produced is further reacted with iodine in the presence of $HIO_3$ to give compound $(X)$. Compound $(X)$ in the presence of $Na$ and dry ether produced compound $(Y)$. The molar mass of compound $(Y)$ is . . . . . . $\text{g mol}^{-1}$. (Nearest integer)

Complete the reactions:
$CH_3(CH_2)_4CH_3 \xrightarrow[anhydrous \ AlCl_3, HCl_{(g)}]{isomerization} ?$
$n-\text{hexane} \xrightarrow{aromatization} ?$