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Q. |
Which of the following is used to remove rust stains on cloth? |
A. | Kerosene |
B. | Lime |
C. | Oxalic acid solution |
D. | Petrol |
Answer» C. Oxalic acid solution | |
Explanation: Oxalic acid is an organic compound with the formula H2C2O2. It is a colourless crystalline solid that dissolves inwater to give colourless solutions. It is classified as a dicarboxylic acid. In terms of acid strength. it is much stronger than acetic acid. Oxalic acid is a reducing agent and its conjugate base, known as oxalate , is a chelating agent for metal cations. |
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