If we study the vibration of a pipe open at both ends, then the following statement is not true:
Pressure change will be maximum at both ends
Open end will be antinode
Odd harmonics of the fundamental frequency will be generated
All harmonics of the fundamental frequency will be generated
As we discussed in
Pressure change will be minimum at both ends. In fact, pressure variation is maximum at because the displacement node is pressure antinode.
Option 1)
Pressure change will be maximum at both ends
This option is correct.
Option 2)
Open end will be antinode
This option is incorrect.
Option 3)
Odd harmonics of the fundamental frequency will be generated
This option is incorrect.
Option 4)
All harmonics of the fundamental frequency will be generated
This option is incorrect.