Colleges in Pune

Yes CBSE, ISC and even State board students can apply for admission in Amity University. There is no restriction for any board (government valid ).

Eligibility for most places is 60% but if you have plans for Masters then keep it as high as possible, until 90-91%.

You can't get admission in the third year of B.Sc directly and also with this kind of desire. You must attend the regular classes to complete your graduation in chemistry honors. Without practical classes, you cannot learn anything. So, no college will allow to do this.
Try to attend regular classes full time.

Yes, they are available now online.

Hi,
I would suggest you to go through the following link:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Hi,
They have some criteria which you need to be eligible for and to know that it would be better if you visit the admission office of the college.

JEE results are out, check it. IIIT-Hyderabad, VIT-Vellore and other private colleges will announce the cut-off rank after JEE Advanced exam is over.
All the best.

For the computer science branch, it would be around 90% to be at the safer side. For more details, you can click on the link given below:
https://www.shiksha.com/college/pune-institute-of-computer-technology-society-for-computer-technology-and-research-pune-satara-road-3715/admission

Yes, with such a great score you can get admission in Mithibai College.

Yes, you can join Narsee Monjee for BMS with 90% in intermediate. You should apply for this college and keep all the particular documents ready.
Best of luck.