M.Sc

Yes, CBSH-Pantnagar does offer M.Sc in chemistry. I have provided a link which has a list of PG programmes in chemistry offered by the college in question.
Link: http://www.gbpuat-cbsh.ac.in/departments/cy/courses.php

Career scope after M.Sc in chemistry:
Post graduates in M.Sc chemistry can find various jobs in both public and private sector organisations. Various job profiles available for graduates in M.Sc chemistry are listed below:
Analytical Chemist
Teacher
Lab Chemist
Production Chemist
Research & Development Manager
Chemical Engineering Associate
Bio-medical Chemist
Industrial Research Scientist
Materials Technologist
Quality Controller
Production Officer
Safety Health and Environment Specialist

IISC, Bangalore is the number-1 institute for pursuing science courses in India. However, if you require further details like placement details, average expected salary, and fee structures, please refer to the link provided below. You should be able to get these details from their brochure uploaded on their webpage.
https://www.shiksha.com/university/indian-institute-of-science-bangalore-22350

Please refer to the link provided below which you can use to make a detailed comparison between colleges of your choice. Nowadays, IISC, Bangalore is rated as the number-1 science college in India and also has a respectable standing in the world rankings. You can compare standings of both colleges at the link mentioned below:
https://www.shiksha.com/science/colleges/m-sc-colleges-india

Please refer to the link provided below for details on scholarships awarded by UAS, Bangalore to its students. You should be able to download their brochure which will contain details regarding any scholarships which is awarded by the institute.
https://www.shiksha.com/university/university-of-agricultural-sciences-uas-bangalore-23402

You should follow your interests and the course you are comfortable studying. Career scope for both MBA or M.Sc in hotel management is more or less the same as the course objectives and syllabus overlaps. For the scope of MBA/M.Sc in hotel management, please refer to the link provided below:
https://www.shiksha.com/hospitality-travel/hotel-hospitality-management/articles/your-career-after-doing-hotel-management-blogId-4630

Please refer to the link provided below for details on exam pattern to pursue M.Sc. from the college mentioned. Details like duration, mode of exam, type of questions asked, no. of questions, marks allocation are mentioned in the link provided below:
https://www.shiksha.com/science/articles/how-to-prepare-for-top-msc-entrance-exams-blogId-13489

Your degrees should be valid if the institute you graduated from is UGC recognised or has the other necessary affiliations. Please check with your university if it has the necessary affiliations. This activity can also be done online.

Please refer to the link provided below for details regarding admission in Gujarat University for M.Sc in environmental science. You will be able to download their brochure which should contain all details regarding admission into the course mentioned above.
https://www.shiksha.com/university/gujarat-university-ahmedabad-29851/courses?uaf[]=sub_spec&rf=filters&ss[]=sp_174&bc[]=100