Question

Classify as primary, secondary, tertiary alcohols.

i. 2-butanol
ii. 3-methyl-3-pentanol
iii. 2-methyl-1-pentanol
iv. 3-chlorocyclohexanol

Answer 1

Here is how you tell them apart.
primary: C holding the OH group has two H atoms; i.e., RCH2OH.
secondary: C holding the OH has 1 H atom; i.e., R2CHOH.
tertiary: C holding the OH group has no H atoms; i.e., R3C-OH

Answer 2

i. 2º
ii. 3º
iii. 1º
iv. 2º

3º= OHCR3
2º=OHCHR2
1º=OHCH2R

Double check and post your answers if you have something different.

Answer 3

Didn't know that you answered.