If I am absent from one of the JEE papers (Paper 1, Paper 2), will my result be declared?

No. Your result will neither be prepared nor declared. However, it is compulsory to appear for both the Joint Entrance Examination papers. IIT Guwahati will release Joint Entrance Examination-Advanced Result 2023. Students can check and download the Joint Entrance Examination-Advanced 2023 scorecard

No, it will not be declared. In order to qualify you should attempt both the papers hence if you are absent then nor your result will be prepared nor declared.