Stains of rust on clothes can be removed by :
A
Oxalic acid
B
Petrol
C
Alcohol
D
H<sub>2</sub>O<sub>2</sub>
Correct Answer: Oxalic acid
Rust stains can be a challenge to remove because the stain consists of tiny iron oxide particles. Acidic solutions work best for these stains. The important ingredient in these removers is an acid - usually oxalic or hydrofluoric acid. The remover ingredients combine with the iron and loosen it from the fabric, then hold it in suspension in the wash water.