JEE Advanced

NCERT is the holy book for IIT. Here are some books for different subjects:
Maths
Arihant
Engage
Physics
HC Verma
Halliday
DC Pandey
Chem
Himanshu Pandey
RC Mukerjee
VK Jaiswal.

Yes, he is eligible, if class 12th score is above 75%, then he can easily appear for JEE Advance 2019.

Yes, you are eligible for this JEE Advance under this quota at this score, as the cut off for this year will be around 80-85 in that you are eligible for the advance paper.

You should be in top 20 percentile or the previous year cut off was 74 marks in general category. So, this year it should be near this.

No, you can't. To appear in JEE Advanced Exam, you need to first qualify the JEE Main Exam. Only then, you can take the JEE Advanced Exam. If you want to take the JEE Advanced Exam then, you should also have to satisfy the other eligibility factors. JEE Advanced exam will be conducted on 27th May 2019. So, prepare yourself well.
Best of Luck!

Hello Vishal,
You have scored a percentile that is above 85. It is expected that this year around 3,00,000 students out of almost 10 lacs who appeared will be cleared to appear for JEE Advanced. This is about 30% of the total number, which translates into a percentile of 70. As you have scored more than 85, I am sure you will be in the cleared list of candidates who can appear for JEE Advanced. However, I would like to advise you to have patience till the end of the month before which national testing agency is expected to announce ranking as well as the clearance to take JEE Advanced.

Hello Krishna,
It's very nice to hear from you that you want to take admission in a college that accepts JEE Mains ranking as the criteria for giving admission. Yes, there are plenty of private or other engineering colleges in India which accept students for admission based on their ranking in JEE Mains. I am attaching a link that will give you the complete list of such colleges including of course IIT and NIT which you can ignore if you want.
https://www.shiksha.com/b-tech/ranking/top-civil-engineering-colleges-in-india-accepting-jee-main/53-2-0-0-6244?pageNo=3

Please visit this site first
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor&ved=2ahUKEwjd0NzModzhAhUZfSsKHfLtA6UQFjAAegQIBBAB&usg=AOvVaw1N9BzFtyUCP4JU-2UQHQ0H.

Hello dear,
Heartiest congratulations for qualifying JEE advance but at the same time I want to mention that for JEE advance one have to fulfill the criteria which is-
The candidates will have to satisfy at least one of the following two criteria for admission to IITs: The candidate should have passed 10+2 or equivalent examination with an aggregate of at least 75%marks. For SC/ ST and PwD candidates, there is a relaxation of 10% as they need the aggregate of minimum 65% marks. Second you have to under top 20 percentile of your boards.
Best of luck.

It is upto cut-off of this year. So, you have to wait for the result announcement and cut-off declaration. Only then, you come to know you are eligible or not. But as you said, you have been attempted 260 marks question according to me you should be eligible if you have been attended atleast 150 marks right question.
Best of luck.