UPCAT

No, as your rank is not so good. You should try few waiver seats of good private colleges or you can go for other government institutions like Purvanchal, Rajkiya colleges, etc.

No, you can't change your preferences. You can float with same choice for the further rounds.

I am a fee waiver student in AKGEC. In my first year, I paid 20k + 22k as fee and caution money. From second year onwards, I am paying approximately 25k per year. I hope, it is helpful to you.

Yes, you can easily get admission in Ajay Kumar Garg Engineering College.

I am listing some colleges please do check the list below:
VishveswaryaInstitute of Technology, Dadri, GB. Nagar
NarainaCollege of Engineering& Technology, Ratanpur, Panki, Kanpur
ABES Institute of Technology, Ghaziabad
Rama Institute of Engineering & Technology, Mandhana, Kanpur.

Yes, I am listing top B Pharmacy colleges under UPSEE. Please do check the list below:
Galgotias University, Greater Noida
HIMT College of Pharmacy, Greater Noida
Dr. A. P. J. Abdul Kalam Technical University, Lucknow
Innovative College of Pharmacy, Greater Noida
Banaras Hindu University, Varanasi
Chhatrapati Shahu Ji Maharaj University, Kanpur
Azad Institute of Pharmacy & Research, Lucknow.

You can submit that later, if you haven't received yet.

For government UPSEE LEET colleges, your rank should be less than 50 and for private colleges, your rank should be less than 200.

Sorry, but now you can't submit it. But, I think you should talk to UPSEE counseling center. They will make this thing possible.

It is not that good college. You can only survive tier and from last some years, there are no placements with this General Rank. You can get better colleges than this.