The acid which contains both $-OH$ and $-COOH$ groups is

Classify the following as primary,secondary,and tertiary alcohols:
$(i)$ $CH_3-C(CH_3)_2-CH_2OH$
$(ii)$ $CH_2=CH-CH_2OH$
$(iii)$ $CH_3-CH_2-CH_2-OH$
$(iv)$ $C_6H_5-CH(OH)-CH_3$
$(v)$ $C_6H_5-CH_2-CH(OH)-CH_3$
$(vi)$ $C_6H_5-CH=CH-C(OH)(CH_3)_2$

Explain the classification of alcohols with examples.

What is the $IUPAC$ name of propylene glycol?

How many sigma $(\sigma)$ bonds are in a molecule of diethyl ether,$C_2H_5OC_2H_5$?

The $IUPAC$ name of the following compound is: