Degree

Yes, it is valid. All the courses offered in distance mode by IKGPTU are recognised by University Grants Commission (UGC). Hence, the classification of the MA course is as per the UGC-approved list. Candidates with a distance degree issued by PTU will never face any difficulty while applying for higher studies or finding jobs anywhere. 

Yes you can and it's better to got 7.6 sgpa. But you have to clear these papers and got a acceptable Mark's to get admisson in M.Sc chemistry in open university. But all said, University would at your overall profile and academic performance.

Yes, Karnataka State Open University degree is valid for several government jobs. 

Students with different degrees attracted different salaries. When we talk about the most remunerative degree at University of Birmingham, Executive MBA attracted the highest average annual salary of £ 96,000. Bachelor (Other) was the second most remunerative degree with an average annual salary of £ 81,000. Masters of Arts attracted the least average annual salary of £ 37,000. MBA attracted an average annual salary of £ 78,000.