According to the website, it is but many schools are not teaching them.
Well it is in ncert i studied it this year but unfortunately no questions came from it so to be on the safe side i would say study it.
Van de graaf is surely not there.
Transistor as an oscillator, transistor as switch, atomic masses, isotopes,isobars,isotones,human eye, Image formation and accomodation, correction of eye defects, van de graaff generator.
According to quora.