Stains of rust on clothes can be removed by :

A. Oxalic acid

B. Petrol

C. Alcohol

D. H₂O₂

Answer: Option A

Solution(By Examveda Team)

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.