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Chemistry miscellaneous
  1. Which of the following is used to remove ink and rust stains on cloth?
    1. Oxalic acid
    2. Alcohol
    3. Ether
    4. Kerosene oil
Correct Option: A

Oxalic acid is a reducing agent and its conjugate base, known as oxalate (C2O2–2), 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.


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