B.Tech Eligibility

To be considered for B.E./B.Tech at Central Institute of Plastics Engineering and Technology (CIPET), Ahmedabad, the applicants should have passed or should have appeared for Class 12 (10+2) or equivalent with Mathematics, Physics, and Chemistry as primary subjects with a minimum of 45% marks in aggregate (40% for reserved categories). Admission will be made through performance in entrance tests like JEE Main or GUJCET. Moreover, candidates must fulfill domicile conditions according to state standards if applying via GUJCET. The upper age limit is generally 21 years for admission.

Hansamukh Goswami College of Engineering is located in Ahmedabad, Gujarat. The candidate must have completed 12th class with 55% marks and physics, chemistry, and mathematics as core subject. Admissions are based on entrance exam that is JEE Mains or Gujarat common entrance test. After clearing entrance exam, candidate can apply and register by admission committee for professional courses (ACPC) portal.

To be eligible for B.E./B.Tech programs at N. B. Navale Sinhgad College of Engineering, Solapur, candidates must have completed their 10+2 education with Physics and Mathematics as compulsory subjects, along with one of the following: Chemistry, Biotechnology, Biology, or Technical Vocational subjects. A minimum aggregate score of 45% is required (40% for reserved categories). Admission is based on valid scores from MHT CET or JEE Main. 

Yes, you can potentially get into Presidency University-Bangalore even with lower 2nd PUC marks, if you perform well in KCET, as KCET scores are a significant factor in the admission process, especially for engineering programs. 

Yes, you are eligible to apply to Jain University, as they require a minimum of 55% in 10+2 for ST category students [1].

With PCB, you are generally not eligible for BTech, as most colleges require PCM. However, some universities offer Biotechnology or related branches for PCB students.

Seacom Group of Colleges BTech selection criteria is entrance-based. The college provides the course across multiple specialisations, such as Civil Engineering, Electrical Engineering, etc. Students need to pass Class 12 from a recognised board with the relevant subjects. In addition, students also need to provide score obtained in either JEE Main or WBJEE. Eligible students can apply online.

For the BTech CSE course, most of the top colleges consider valid entrance test marks. You should work hard and get excellent marks in the exam to grab a seat for yourself. 
Having said that, there are more than 1,200 BTech CSE colleges in India that give admission on the basis of Class 12 marks. The colleges may also take extra rounds like the GD or PI. Also, a few colleges may give 50-50 weightage to both the factors.
So, do check the college websites for detailed and accurate information.