M.Tech

No, Those who have completed BE or B.Tech are eligible to study M.Tech. Since, You completed your B.Sc. I would suggest you to go with M.Sc.

Eligibility Criteria:
BE Chemical Engineering / B.Tech Food Technology / Biotechnology / Biochemical Engineering / Agricultural Engineering.
Admission Guidelines:
Selection of the candidates to various disciplines of ME and M.Tech programmes will be done on the basis of their performance in the entrance examination and interview. Both are conducted by the university.

Yes, for M.Tech in Chemical Engineering eligibility criteria is 60% or above in relevant discipline at Graduation level. For more details kindly go through University website or this link:
https://www.galgotiasuniversity.edu.in/m-tech-in-chemical-engineering.asp

After B.Tech in computer Science, that won't be possible as basic eligibility to take admission in this course is graduation i.e. BE/B.Tech in aerospace or allied specializations. Admission to this course is done through GATE in most of the engineering colleges in India. Course fee ranges from INR. 2 Lacs. to INR. 4 Lacs.

There is no M.Tech in USA. It is called MS there, attempt GRE and TOEFL make your CV strong, then apply for the Universities in USA. All the best.

Well, of course, it would be beneficial for you. But, in order to pursue an M.Tech, doing a B.Tech is a prerequisite. Therefore, my suggestion would be that you first enroll in a college of your choice which offers B.Tech programme. Then, go for M.Tech. Best of luck.

Hello Simson,
ICT will conduct test for giving admissions to postgraduate and higher courses. I am attaching a link that will give you all the required information about different aspects of the admission and allied information about ICT.
http://www.ictmumbai.edu.in/DisplayPage.aspx?page=ge&ItemID=k
Best wishes to you.

IITs, NITs and other state level colleges for M.Tech in VLSI are:
-IIT Kharagpur (KGP)
-IIT Kanpur
-Indian Institute of Technology, [IIT] Delhi
-IIT Roorkee
-IIT Guwahati
-GITAM Institute of Technology
-National Institute of Technology, [NIT] Surathkal
-Punjab Engineering College University of Technology, [PEC] Chandigarh
-Visvesvaraya National Institute of Technology, [VNIT] Nagpur
-Malaviya National Institute of Technology, [MNIT] Jaipur
-Dr. BR Ambedkar National Institute of Technology, [NIT] Jalandhar
-SRM University, Chennai
-National Institute of Technology, Hamirpur [NIT Hamirpur]. .

Where do you wish to apply? Please specify the name of the college/institute.