Offline and online chemistry courses both are good and effective but which one is better is completely upto your personal needs like

Online chemistry courses would be better

  • If you want to connect with multiple resources and teachers
  • If you want flexible timings
  • If you want video recordings of the classes to replay and understand concepts
  • If you want to study according to your own speed

Offline chemistry tuition would be better

  • If you want to interact with teachers face to face
  • If you want to instantly solve your doubt in person