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Which of the following can be used for removal of stains of rust on clothes? 1. H2O2 2. Oxalic acid 3. Petrol 4. Alcohol (a) 1 and 2 (b) 2 only (c) 3 and 4 (d) 1, 2, 3 and 4 |
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Answer» The correct option is: (b) 2 only Explanation: Oxalic acid is used as rust removal agent because it forms a stable water soluble salt with ferric iron i.e., ferrioxalate ion. |
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