In question your saying 10 questions but asking 12 questions.
So trying to Answer 10 questions.
1. Mangalore :cross: (Rome of the East)
2. Damodar Valley :cross: (it's not a city)
3. Chennai :check:
4. Ahmedabad :check:
5. Kodagu :cross:
6. Jaipur :check:
7. Jamshedpur :check:
8. Mumbai :cross:
9. Jaiselmer :cross:
10. Udaipur :cross:
11. - -
12. - -