Question

Write one example of each Primary - Secondarytertiary , allylic & benzylic alcohol​

Answer 1

Answer:

(i)

(ii) CH2C = CH - CH2OH

(iii) CH3 - CH2 - CH2 - OH

(iv)

(v)

(vi)

Answer

Primary alcohol → (i), (ii), (iii)

Secondary alcohol → (iv), (v)

Tertiary alcohol → (vi)

Answer 2

Explanation:

Example of

(i) Primary Alcohol -

CH3-CH2-OH (Ethanol)

(ii) Secondary Alcohol -

CH3-CH-CH3 (propan-2-ol)

⠀⠀⠀⠀|

⠀⠀⠀OH

(iii) Tertiary Alcohol -

(2-methyl-propan-2-ol)

⠀⠀⠀CH3

⠀⠀⠀⠀|

CH3- C-CH3⠀⠀

⠀⠀⠀⠀|⠀⠀⠀⠀⠀⠀⠀

⠀⠀⠀OH

(iv) Allylic Alcohol -

CH2=CH-CH2-OH (prop-2-en-1-ol)

(v) Benzylic Alcohol -

C6H5-CH2-OH (Phenyl methanol)

Additional information (Alcohol) -

Physical state -

• At room temperature, lower alcohols are colourless liquids with distinct smell and burning taste.
• The higher member are colourless, odourless, waxy solid.

Boiling point -

• The boiling point of alcohol and phenols increase with increase in number of C-atoms.

Reason -

Due to increase in van der waals' force.

Solubility -

• The solubility of alcohols and phenols in water is due to their ability to form H-bonds with water molecules.