CBSE 12th

Please visit this site. I hope this will help you-
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

I suggest you to go with NITs if your rank is less than 800, or apply for JEE Advanced paper 2 and after results if you get the same percentile you can easily get admission in IITs for B.Arch!
If not you can go with top NITs for pursuing your B.Arch!

Hi,
Both the options are good but they are totally different. B.Sc is basically knowledge oriented course whereas engineering from any branch is job oriented course. If you are passionate to get the deep knowledge of physics, chemistry and maths then go for B.Sc, and further M.Sc.
For chemical engineering, I would suggest you to choose a reputed college or appear in JEE exam at least one time.

Yes, it's a good idea for you to do a degree and pursue a Master's degree. As pursuing Master's degree helps you in getting placed at even more good companies with a reasonable package.

Yes, you can apply in this course but might not be able to get admission in top colleges because the cut-off list goes high.

Your percentile is not very good. So, your chances are very low.

According to your percentile, you may get admission in this college.

there is less chance to get this college.
good luck

Hello Ankit,
You may use the link below to know your chances of getting a college for software engineering with your JEE Main score :
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
You may also check out the following article :
https://www.shiksha.com/b-tech/ranking/top-computer-science-engineering-colleges-in-india/46-2-0-0-0

Yes, you can take admission in the desired college. Firstly, apply for admission in the college website and undergo through entrance test.