JEE Main

It depends upon merit, however 220-230 marks are well enough.

To take admission in IIST in any branch, a general category candidate must secure atleast below 5700 rank. To get admission in B.Tech aerospace engineering, general category candidates must secure atleast below 4500 rank. These predictions are according to the 2016 admission statistics. For any more details visit https://www.iist.ac.in/admissions/undergraduate

It depends on NIT branch and your category. A general category student can get admission for CS in MNIT, Jaipur with around 200 marks.

Hello Salman,
Merely reading books is not going to help anybody. What is of most importance is the ability to think logically. Try to understand the concepts being taught in 12th. Another important aspect is the ability to answer MCQs in stipulated time. There are different agencies offering their services in both of these aspects. Select any one of these.

Hello Neha,
CBSE has not yet released application form. It's likely to occur by first week of December. You will get time till second week of January 2017 to fill it up online.
So, don't worry but start studying in earnest.

Yes, it can be. Kindly, study NCERT for chemistry (it contains minimum 15 questions directly from the theory given in it).

JEE Mains exam will be held on 2nd April 2017 and the result will be declared on 27th April.

You can practice of books HC Verma, NCERT, S L Arora, DL Pandit and Pradeep's.

Hello,
A student is allowed to appear thrice in JEE Mains. This, of course, is subject to other criteria like your age, score in 12th, etc.

Hello Harshit,
Till last year, marks obtained in 12th were normalised, added with score in JEE Mains and final score used to be declared. However, from this year onwards, marks obtained in 12th will not be considered in declaring result of JEE Mains. Hence, we can expect some variation in ranking versus marks of JEE with respect to last year's status. However, as a rule of thumb you should get at least 180 marks to have rank of up to 10000.