What is $Cresol$?

Which of the following statements is not incorrect?
$(i)$ tert-butyl chloride is easily hydrolysed to give alcohol.
$(ii)$ Secondary alcohol gives a blue colour in the Victor-Meyer test.
$(iii)$ The $IUPAC$ name of the given structure is $3-$methylpentan$-2-$ol.
$(iv)$ Alcohol releases $CH_4$ gas with a Grignard reagent (not $H_2$ gas).

Consider the following methods $:$
$I$: Hydration of olefins
$II$: Hydrolysis of alkyl halide
$III$: Reduction of carbonyl compounds
Which of these can be used to prepare alcohols ?

Diethyl ether is not associated with which one of these isomers?

In the following reaction,$\text{Phenol}$ $\xrightarrow{Zn \, \text{dust}} x$ $\xrightarrow[\text{Anhy.} \, ZnCl_2]{CH_3Cl} y$ $\xrightarrow{\text{Alk.} \, KMnO_4} z$. The product $z$ is:

$p-$Cresol reacts with chloroform in an alkaline medium to give compound $A$,which reacts with hydrogen cyanide to form compound $Y$. Hydrolysis of $Y$ gives a chiral carboxylic acid. Identify the structure of the carboxylic acid.