Question

Which of the following will you use to remove rust stains  on cloth?

Options

• Alcohol

• Oxalic acid solution

• Kerosene oil

• Lime

Answer 1

Oxalic acid solution

Explanation:

Oxalic acid's main applications include cleaning or bleaching, especially for the removal of rust (iron complexing agent). Bar Keepers Friend is an example of a household cleaner containing oxalic acid. Its utility in rust removal agents is due to its forming a stable,  water-soluble salt with ferric iron, ferrioxalate ion.