Police have arrested one of the accused. He has been identified as Manjeet, the woman's landlord.
The incident took place around 8:30 PM when the woman, who worked at a nearby factory, was returning home. The accused on a bike threw the acid and fled away.
"Locals rushed her to a nearby hospital where doctors treating her said she has suffered severe burns on the right side of her face which has also partially damaged her eye," said a police officer.
"He claimed that the two were in a relationship but things turned sour over something following which he decided to teach her a lesson," he said.
A case for attack using acid has been registered against him and efforts are on to nab his associate, police said.