68. Which of the following is used to remove ink and rust stains on cloth? A.Oxalic acid B.Alcohol C.Ether D.Kerosene oil
Answer: Option A Solution: Oxalic acid is a reducing agent and its conjugate base, known as oxalate, is a chelating agent for metal cations and stain removal. Oxalic acid's main applications include cleaning or bleaching, removal of stains on clothes and the removal of rust.
