Could someone explain that, please?
What is the difference between these sentences?
(I suppose both are correct, but maybe one is more informal or something like that)
1) What page I should open my book on?
2) On what page I should open my book?
BTW. Did I write the title properly? Should there be "a preposition" and "a question" or the articles can be omitted?
English Scholars would say that (2) is the correct version.
Normal people say and write (1).
The classic academic statement is 'never use a preposition to end a sentence with'.....technically incorrect, but practically that is how people speak. People are always right, academics are normally well behind reality.
English is, and always has been, an evolving language. Academics are, and always have been, resistant to change. English Scholars need to start living in the real world.