Hi there  as per your percentile your ranking will be 40,000+. You can go for following colleges to get chemical branch -

1. Vivekanand education society's Institute of management studies and research, mumbai

2. Ramrao adik Institute of Technology,mumbai

3. Vidyalankar Institute of technology,mumbai

4. Bhartiya vidyapeeth college of engineering,mumbai

5. DY patil institute of engineering management and research,akurdi,pune

6. Sinhgad college of engineering,pune

7. PCCOE, pune

8. Yashwantrao chavan college of engineering,nagpur

Good luck