From which of the following is tertiary butyl alcohol obtained by the action of methyl magnesium iodide?

Which of the following alcohols cannot be prepared from the hydration of an alkene?

Primary alcohols can be obtained from the reaction of the $RMgX$ with

In the following reaction,$'A'$ is:
$C_2H_5MgBr + CH_2(O)CH_2 \xrightarrow{H_2O} A$

Show how you would synthesize the following alcohols from appropriate alkenes:
$(i)$ $1$-methylcyclohexanol
$(ii)$ $3$-methylhexan-$3$-ol
$(iii)$ pentan-$2$-ol
$(iv)$ $2$-cyclohexylbutan-$2$-ol

$CH_3-CH_2-C(Ph)(OH)-CH_3$ can not be prepared by: