Tag: nomenclature of alcohols and phenols

The correct option is C. Ethanol is alcohol and is a primary $1$ degree monohydric alcohol with moleculer formula $C _2H _5OH.$

Butane-1,2-dione is the correct IUPAC name for a four-carbon chain with two ketone groups at positions 1 and 2.

$\overset{3}{C}H _3-\overset{2}{\underset{CH _3}{\underset{|}{CH}}}-\overset{1\,\,\,\,\,}{CH _2}-OH$

$-OH$ (Hydroxyl group) is the functional group of alcohol. Because, if we add $-OH$ to a Methyl group $(-CH _3)$, it will be converted to Methyl alcohol $(CH _3OH)$

The longest chain containing the ketone and alcohol groups is 5 carbons. The ketone is at position 3 and the alcohol at position 1, with a methyl group at position 4.

$2,4,6-trinitrophenol$ is picric acid while, $2,4,6-trinitrotoluene$ is $TNT$.

${ CH } _{ 3 }^{ 3 }{ CH } _{ 2 }^{ 2 }{ CH } _{ 2 }^{ 1 }{ OH }$
Carbon with functional group gets position 1. Therefore, IUPAC name is Propan-1-ol.

Two functional group $OH (ol)$  is attached at carbon no $2$ & $ 3$ so its name is butane$-2,3-$diol.

$CH _{3}-CH(CH _{3})-CH _{2}-OH$ is a primary alcohol as hydroxal group; -OH is attached to the primary carbon.