Can adult cases of exotropia caused by or associated to blindness in that eye be corrected with surgery.

Yes. Eye muscle surgery is often done to straighten cosmetically unacceptable eyes.
Yes, but . The eye that is turned can be surgically straightened. But if there is no useful vision in it, there is nothing to keep it straight over time. Your brain does not really control which direction that "blind" eye points in. The eye may turn out again as the years pass.