Chemistry - Nomenclature Question with Solution | TestHub

Neopentyl alcohol has the structure (CH${}_3$)${}_3$ C-CH${}_2$ -OH.

There are three methyl (CH${}_3$) groups, each containing three primary hydrogen atoms. This accounts for $3\times 3=9$ primary hydrogens.

The -CH${}_2$ -OH group contains two primary hydrogen atoms (the carbon is attached to only one other carbon atom, making it a primary carbon). Total primary hydrogens = $9+2=11$.