@ ABHINAB
THE WHOLE syllabus of 11th will come in the aipmt paper , cbse will ensure that from every chapter the ques will be asked , and if u are comparing the aipmt paper from 11th and 12th point of view then 11th do constitute the 50 percent and 12th constitute 50 percent .
and this year in neet phase 1 they have asked chemistry more from class 12 , so, thats unpredictable as of now , so, prepare evry topics oif class 11 to get good rank in aipmt ..
u can refer to askiitian self study package to clear the concept ..
ALL THE BEST ..