Absolute alcohol ($100\%$ alcohol) is prepared by distilling rectified spirit over:

Arrange the following in the correct order of their boiling points.

$I$. $(C_2H_5)_2O$

$II$. $CH_3(CH_2)_3OH$

$III$. $CH_3CH(CH_3)CH_2OH$

$IV$. $CH_3(CH_2)_3CH_3$

What is the product of the reaction between phenylmagnesium bromide and methanol?

$ROH + HX \to RX + H_2O$
In the above reaction,the reactivity order of hydrogen halides is

The reaction involved in the oil of wintergreen test is salicylic acid + reagent $\xrightarrow[Conc. H_{2}SO_{4}]{\Delta}$ product. The product is treated with $Na_{2}CO_{3}$ solution. The missing reagent in the above reaction is

The major product of the following reaction is: