The victim took the extreme step after a youth identified as Nilesh Ladia, allegedly molested her, they said, adding that her father had lodged a complaint.
The 16-year-old girl suffered 100 per cent burn injuries and is under treatment at the district hospital, the police said.
Allegedly, Ladia had threatened her that if she did not respond to his overtures, then she would have to face the consequences when she went to school to appear for examinations, her father said in his complaint.