$A$ new carbon-carbon bond formation is possible in

In the above reaction,the molecular formula of glycerol increases by:

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).

When phenol is treated with $CHCl_3$ and $NaOH$ followed by acidification,salicylaldehyde is produced. Which of the following intermediates is involved in the above reaction?

The above transformation can be carried out by:

The increasing order of the boiling points for the following compounds is
$C_2H_5OH$ $(I)$,$C_2H_5Cl$ $(II)$,$C_2H_5CH_3$ $(III)$,$C_2H_5OCH_3$ $(IV)$