Hello Ish,

You can surely learn 12th syllabus without class 11th. But, you will face  lot of problems in understanding the topics and concepts, because all the basics you need to prepare for 12th are in the syllabus of 11th class. So, when you will start preparing for 12th directly, you will end up messing the things. Honestly saying, it is possible to learn 12th directly, but it is very tough to learn it without the basics.

So, I will suggest you to study class 11th first, so that your basics will be cleared and it will be a bit easier for you to clear 12th class.

All he Best for you examination. Do prepare for it with full determination. Hoping for your positive result in the examination.