@ satya
to check wheather its primary , secondary or tertiary u need to check on which alpha carbon atom the nitro compound is linked with ,
if its linked with a 1 degree carbon atom then its primary ,
if 2 degree then secondary and if 3 degree then tertiary .
They are classified into primary (1
), secondary (2 ) or tertiary (3 ) amines, depending on whether nitrogen is joined to one, two or
three alkyl or aryl groups respectively.
HOPE IT CLEARS YOUR DOUBT
ALL THE BEST .