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| Q. |
Which of the following produces H2 gas, when reacts with acid? |
| A. | Zn |
| B. | S |
| C. | C |
| D. | O |
| Answer» A. Zn | |
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Explanation: As, Zinc is a metal so it will produce H2 gas when reacts with acid. Active metals react with acids to produce hydrogen because they are above hydrogen in the activity series. |
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