hello aspirant,

If any candidate fails to appear or fails at one or all the chances of compartment examination shall be treated to have failed in the examination and shall be required to reappear in all the subjects at the subsequent annual examination of the Board as per syllabi and courses laid down for the examination concerned.

furthermore, I will suggest you some of the preparation tips for scoring best marks in class 11:

Know the syllabus properly . The syllabus of Class 11 is elaborate. You should be thorough with the syllabus before you start to prepare for your lessons. Prepare a timetable considering your areas of strength and the time you want to dedicate to the topics.

Further, to know more about the kerela plus one syllabus in more detail, you can follow below mentioned link to know more : https://school.careers360.com/exams/kerala-dhse

I hope that this will help.