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| Q. |
Oil of vitriol is - |
| A. | nitric acid |
| B. | sulfuric acid |
| C. | hydrochloric acid |
| D. | phosphoric acid |
| Answer» B. sulfuric acid | |
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Explanation: Sulfuric acid or was called "oil of vitriol" by medieval European alchemists because it was prepared by roasting "green vitriol" in an iron retort. |
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