I want to join 1st PUC science. when admissions get open?
Regarding the admissions for 1st PUC you can visit the below official link of admission circular- http://pue.kar.nic.in/PUE/PDF_files/adm_guide/2019-20/admission%20circular%202020-21.pdf
I also recommend you to keep checking the official website for admission guidelines as all the details regarding admission process gets updated there.