The deceased, Mukesh Solanki who belonged to Muvadi village in Kaira district, was an autorickshaw driver.
Mukesh and his wife Daxaben were sleeping outside their house on Thursday night when the accused, identified as Budha Solanki, allegedly flung acid on them, causing serious burn injuries, police said.
Daxaben said in her statement at the hospital that Budha was involved in some dispute with her husband, said P S Gadhvi, sub-inspector of Chaklasi police station.