$PCC$ is

Methanol and ethanol are soluble in water due to......

An organic compound dissolved in dry benzene evolved hydrogen on treatment with sodium. It is

When a Grignard reagent reacts with $(B)$,product $(D)$ is obtained. Reactant $(A)$ of the above reaction is:
$(A)$ $\xrightarrow{PBr_3} (C)$ $\xrightarrow{Mg, \text{ether}} \text{Grignard reagent}$
$(A) \xrightarrow{Na_2Cr_2O_7, H_2SO_4} (B)$
$\text{Grignard reagent} + (B) \to (D) \xrightarrow{H_3O^\oplus} (3,4-\text{dimethylhexan-3-ol})$

The reagent used for the conversion of allyl alcohol into propenal is

The reaction between cyclobutylmagnesium chloride and cyclobutanol is shown below. Identify the product $P$.