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| Q. |
Citric acid is present in free form in – |
| A. | Tamarind |
| B. | Milk |
| C. | Apple |
| D. | Lemon |
| Answer» D. Lemon | |
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Explanation: Lemons, oranges, limes, and other citrus fruits naturally possess high concentrations of citric acid. The juice of the lemon is about 5% to 6% citric acid, which gives lemons a sow- taste. In fact, Citric acid was first isolated in 1784 by the chemist Carl Wil-helm Scheele, who crystallized it from lemon juice. |
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