The common name of Benzene-$1, 2$-diol is:

Explain the classification of alcohols with examples.

Which structure represents cyclohexyl alcohol?

Match the items in Column-$I$ with the appropriate items in Column-$II$.

Column-$I$	Column-$II$
$(A)$ One or more hydroxyl $(-OH)$ groups are directly attached to the carbon of an aliphatic system.	$(1)$ Water
$(B)$ $-OH$ group is directly attached to the carbon of an aromatic system.	$(2)$ Phenol
$(C)$ Alkyl or aryl group replaces the $H$ of the $-OH$ group of alcohol or phenol.	$(3)$ Ether
$(D)$ Hydrogen replaces the $-R$ group of alcohol.	$(4)$ Alcohol
	$(5)$ None

$Crotonyl$ alcohol is an example of

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