The product$(s)$ not obtained in the following reaction is:

Identify the product $B$ in the following sequence of reactions:
$CH_3-CH_2-CH_2-OH$ $\xrightarrow[623 \ K]{Al_2O_3} A$ $\xrightarrow[(ii) H_2O, \Delta]{(i) conc. H_2SO_4} B$

Which of the following compounds will give the iodoform test?

Arrange the following in order of their reactivity when reacting with $HCl/ZnCl_2$ (Lucas reagent):
$I. CH_3-C(CH_3)_2-OH$
$II. CH_3-CH(CH_3)-OH$
$III. CH_3-CH_2-OH$
$IV. Ph-C(CH_3)_2-OH$

$3$ moles of ethanol react with $1$ mole of phosphorus tribromide to form $3$ moles of bromoethane and $1$ mole of $X$. Which of the following is $X$?

Which of the following oxidation reactions can be carried out with chromic acid in aqueous acetone at $5 - 10^{\circ}C$?