Which of the following is the most suitable method to remove small amounts of water from ethanol?

The alcohol that produces turbidity immediately with $ZnCl_2 / \text{conc. } HCl$ at room temperature is:

Consider the following reaction sequence:
$\text{Cyclohexanol}$ $\xrightarrow{CrO_3} A$ $\xrightarrow{CH_3MgBr / H^+, H_2O} B$ $\xrightarrow{H_2SO_4, \Delta} C$ $\xrightarrow{B_2H_6, H_2O_2, OH^-} D$
Identify the final product $D$.

Which alcohol produces turbidity with Lucas reagent after five minutes $:-$

$A$ compound $X$ with molecular formula $C_3H_8O$ can be oxidized to a compound $Y$ with the molecular formula $C_3H_6O_2$. $X$ is most likely to be

Which of the following compounds gives the most stable carbonium ion during dehydration?