Identify the product formed when $(R)-2-$butanol and $(S)-2-$butanol react with $(R,R)-$tartaric acid in an acidic medium.

An organic liquid $A$ containing $C$,$H$,and $O$ has a pleasant odour with a boiling point of $78\ ^\circ C$. On boiling $A$ with conc. $H_2SO_4$,a colourless gas is produced which decolourises bromine water and alkaline $KMnO_4$. One mole of this gas also reacts with one mole of $H_2$. The organic liquid $A$ is:

How can $CH_3OH$ be distinguished from $C_2H_5OH$?

$HO-CH_2-CH_2-OH$ on heating with periodic acid gives:

Write the structures of different isomeric alkyl groups corresponding to the molecular formula $C_{5}H_{11}$. Write the $IUPAC$ names of the alcohols obtained by the attachment of $-OH$ groups at different carbons of the chain.

$A$ reaction between $CH_3MgBr$ (methyl magnesium bromide) and $C_2H_5OH$ (ethyl alcohol) gives: