Multiple choice

Which of the following is used to remove rust stain on cloth?

  1. Kerosene

  2. Lime

  3. Oxalic acid solution

  4. Petrol

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxalic acid solution is used to remove rust (iron oxide) stains from cloth. Oxalic acid reacts with iron oxide to form soluble compounds that can be washed away. Kerosene, lime, or petrol are not effective for rust stain removal - they work on different types of stains.