Suspecting infidelity, a man in Namakkal, Tamil Nadu, threw acid on his wife, who suffered serious burn injuries, police said on Thursday.
The incident occurred on Wednesday after the couple had an heated argument, police said.
The woman, mother of three children, was at her parents house. Her husband, a painter, went there and threw acid on her, police said.
The 27-year-old victim was admitted to a government hospital, police said, adding her condition was critical.
Police has arrested her husband and cases were registered against him under various sections of IPC, including 307 (attempt to murder).