Dear aspirant !

Hope you are doing great ! No you will not fail at all in your class 12th if you fail in one exam in term 2 . CBSE also has said that you can leave the term 2 exam if you think your practical marks and term 1 exam are enough to get pass ,and many jee and neet aspirant are aslo doing the same to save their time from the boards . So don't worry ,be relax and give your best you have a chance to prove yourself .

Hope it helps you !

Thank you