Hey!!

First of all, I will not give you an sugar coat advice because it's the question of your career. So I will directly come to the point. Here you need to understand that the 11th standard is like the nursery of the stream choosen. Means you learn the basic concepts of the subjects. Like to make a word or sentence, you need knowledge of alphabets, exactly like that. Also, 11 standard is also tough as compared to 12th as it gives you a different level of the stream and great exposure to the challenges. But it's also true that it's not impossible to score a very good marks in 12th standard even you have not studied in 11th and  I have personally seen the students who don't do well in 11th but became star in 12th but for that you need to hard work and specially a right guidance and teacher who can clear your basic concept before rushing into topic . Then there will be no problem at all.

Hope this helps

Good luck

Hi,
    Since you have not studied 11th science at all,  you could face a little problem grasping the concepts of 12th. Especially in physics and chemistry. I am assuming you will go in 12th std now and are worried you would not be able to cope up with science portion. Well let me tell you, you can still cover up the portion in the one year that still remains in your hand. It is not as bad as changing your field of study itself. If you really are interested in science field, then all you have to do is push a little hard in 12th.begin now.. If you are not able to grasp any concept, open that dusty 11th std text book and search for the pre requisite topic that you need to go through. If you have good college professors, then you don't have to worry about anything. They will clear your doubt. Don't give up just yet on your science dream. Good luck!  You can do it.