When $3$-methylbutan-$2$-ol is treated with $\mathrm{HBr}$, the following reaction takes place:

Give a mechanism for this reaction.

Classify the following compound as primary, secondary and tertiary alcohol:

${\mathrm{H}}_2\mathrm{C}=\mathrm{CH}-{\mathrm{CH}}_2\mathrm{OH}$

Classify the following compound as primary, secondary and tertiary alcohol:

${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2 -\mathrm{OH}$

Classify the following alcohol as primary, secondary and tertiary alcohol:

Classify the following alcohol as primary, secondary and tertiary alcohol:

Classify the following compound as primary, secondary and tertiary alcohol:

Identify allylic alcohols in the given examples.

Name the following compound according to IUPAC system.