Hello

As you have stated that you have got 80 Marks in IISER entrance exam and you are from general category. I would like to tell you that the last year minimum cutoff for IISER was 75. For IISER trivandrum it was over 90. And every year cutoff almost increases,  so may not get admission in IISER Trivandrum but yes you might have chance in other IISER but you will have to wait till 3rd round or after that to get your choice.i would suggest you choose your seats accordingly and go for counselling.  I hope it helped