Hello Aspirant,
First of all congrats on gaining so many options from top institutes. Regarding the choice you need to make , first you should find out which engineering field interests you the most. For that you need to know what you will learn in it and what kind of job you will be having upon completion . The career prospects should match your personal career goals. When we take the scope of these engineering branches , metallurgy is all about metals and alloys , study about shaping them ,production of alloys , learning about their properties etc. The scope is not bad nor too good. Hence, you need to stay committed to reach a desired career level.But the competition is not too high hence , you will for sure be employed, that too from an IIT you can expect more in terms of a decent placement. Also if you have further study interest , then this field is good for research .
Next with chemical engineering a lot more that chemistry hence it is an interesting field and you may get into a lor of areas like food sector, energy,manufacturing, materials(plastics).biotechnology,chemical or allied products, pharmaceuticals and many more. Even here, if you have research aptitude , you may go for further studies and get youself an attractive career.
Coming to CSE and ECE , both are among popularly chosen engineering branches, hence I need not say about the scope or job areas, all that matters is your interest. However it is a known fact that CSE has the most widest scope out of all , its computer science is sort of the backbone in any technology related field.Also it is worth noting that many ECE students endup getting placed in CS,IT industry.Hence, unless you extremely keen about semiconductors and communication system , you may better choose CSE ,if you are good at programming.
And finally civil engineering can be your option if you have enough patience and creativity , also passion towards buildings.The scope is a good but , you need have real good skills and it may still take time to get a desired job profile.
Now regarding which IIT you need to opt, all except IIT Goa are old and high ranked IITs. And talking about IIT Goa, they supervised by IIT Bombay, so you can expect similar training.By other means the experience would be decent enough and you may consider only if finally decide CSE is your core interest. D not worry about placements ,CSE always have good placements no matter what. But if you want a rich learning experience ,and IIT experience is rare, then go for older IITs . Choose from other branches after a thorogh research about those field. Again do not worry about placements , if you are hard working and is committed enough to the subject ,you will end up fine. Moreover being an IITian you will not be ignored anywhere.
Hence , again choose based on your interest, skills and future career goals.
All the best
Hope this helps
IIT Bombay Metallurgy and IIT Madras Chemical both are excellent options with excellent opportunitues in all of Core, Non Core, IT, Software and Analytics Sectors.
Perhaps when making a choice between the above two, I would suggest you to choose the Institute at vicinity of your hometown. Both the Branches have equally great Placements, Academic Outlook, Research opportunitues and Infrastructure.
For more information and college prediction do follow the link below
https://engineering.careers360.com/jee-advanced-college-predictor?icn=QnA&ici=qna_answer
College Comparison based on Courses, Placement, Rank, Fee
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile