421.

Write the mechanism of the following reaction:

CH₃CH₂OH ---> HBrCH₃CH₂Br + H₂O

Write the equations involved in the following reactions :
Wolff-Kishner reduction

Write the product(s) in the following reactions:

Give simple chemical tests to distinguish between the following pairs of
compounds :
Ethanol and Phenol

Give simple chemical tests to distinguish between the following pairs of
compounds :
Propanol and 2-methylpropan-2-ol

Write the formula of reagents used in the following reactions :
Bromination of phenol to 2,4,6-tribromophenol

Write the formula of reagents used in the following reactions :
Hydroboration of propene and then oxidation to propanol.

Arrange the following compound groups in the increasing order of their property indicated :
p-nitrophenol, ethanol, phenol (acidic character)

Arrange the following compound groups in the increasing order of their property indicated :
Propanol, Propane, Propanal (boiling point)

Write the mechanism (using curved arrow notation) of the following reaction :