Hello there!

Greetings!

I am extremely sorry to tell you dear but you haven't mentioned the name of the exam regarding which you want to know that how much marks will you be able to get if you don't complete class 11th syllabus of Chemistry.

In case if you are asking about neet examination dear , then class 11th chemistry has nearly 50% weightage of the total questions asked in ncert, so if you skip class 11th chemistry you are directly going to lose 50% of your marks in chemistry section . So even if you answer all the questions asked from 12th chemistry, you will get only around 90 marks in chemistry section in neet examination. And if you are asking about jee mains, even then case is similar, you will lose 50% of marks in chemistry section at least.

I am providing you below chapterwise weightage for neet examination, it will give an idea about weightage of class 11th chemistry in the question paper.

https://medicine.careers360.com/articles/neet-chapter-wise-weightage-and-important-topics/amp

Go the link , and I suggest you not to skip class 11 chemistry, you should at least complete those chapters which you find easy and has high weightage.

Thankyou