Question

what is chemoosmotic hypothesis?

Answer 1

First of all its  chemiosmotic hypothesis  

The chemiosmotic hypothesis suggests that the action of ATP synthase is coupled with that of a proton gradient. It is the action of the proton gradient that causes a proton motive force that allows ATP synthase to phosphorylate ADP and inorganic phosphate to ATP.

Answer 2

Chemiosmotic hypothesis is a theory developed to understand the synthesis of energy rich compounds ATP by breaking the concentration gradient of H+ ions created by different ways.you can read it in detail in NCERT 11. Class textbook.