Explain the classification of alcohols with examples.

(N/A) Alcohols and phenols can be classified as mono-,di-,tri-,or polyhydric compounds depending on whether they contain one,two,three,or many hydroxyl $(-OH)$ groups respectively in their structures.
$1$. Monohydric alcohols: Contain one $-OH$ group. Example: Ethanol $(C_2H_5OH)$.
$2$. Dihydric alcohols: Contain two $-OH$ groups. Example: Ethane-$1,2$-diol $(CH_2OH-CH_2OH)$.
$3$. Trihydric alcohols: Contain three $-OH$ groups. Example: Propane-$1,2,3$-triol $(CH_2OH-CHOH-CH_2OH)$.