JEE Eligibility

This year onward, you have to score at least 75% in class 12 marks if not then you have to be placed in top 20 percentile of your bored so if you are in top 20 percentile of your board then you are eligible for IIT exam 2018.
Regards.

No, seats are allocated on the basis of your preference. Please put your choices on the basis of your preference (higher preference first) for desired results. If you prefer CSE then put CSE on 2nd choice and after that civil on third choice.

Yes, you are eligible for next year JEE exam.J EE has nothing to do with your past years. Although you will have only one attempt for JEE Advanced and two for JEE Main.

You need to get 75% marks from Physics, Chemistry and Maths for general category for getting into IIT, Gandhinagar.

See, if your JEE score is below 70, then there is very less chance for you to score good marks in the next year. (I am talking about the chances, there can be exceptions but exceptions are very less)
Still, if you know that you won't get any decent college this time and have a decent grasp over the basics, then go for dropping.

No, you won't get selected.

Yes Chandrakiran, you can.

Yes, you are eligible to give that entrance exam but you can't get admission because your board score is less.

I'd like to tell you that you must be able to score 75% marks in +2 as a min. eligibility in order to appear for JEE Mains. JEE Mains consists of two papers- paper-1 (For B.Tech admission in NITs, GFTIs, also need to qualify JEE Mains to appear for JEE Advanced) paper-2 ( or B.Arch admission in NITs and SPAs). If you are interested in pursuing B.Tech in IIT, you need to qualify in JEE Mains and should appear for JEE Advanced. Also, you need to appear for AAT if you want to pursue B.Arch in IIT. JEE Mains is regarded as one of the most competitive exams so you need to excel every topic of the syllabus in order to gain an upper hand.

Government colleges in West Bengal do not accept JEE Mains scor5e. They conduct their own exam called WBJEE, so you have to score good marks in WBJEE to get admission here.