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Why is granulated zinc used for the prep...

Why is granulated zinc used for the preparation of hydrogen gas ?

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**Step-by-Step Text Solution:** 1. **Understanding the Question**: The question asks why granulated zinc is specifically used for the preparation of hydrogen gas. 2. **Reason 1 - Larger Surface Area**: Granulated zinc is used because it has a larger surface area compared to other forms of zinc, such as zinc powder or zinc pieces. A larger surface area allows for more effective interaction with the acid, leading to a faster and more efficient reaction. 3. **Reason 2 - Presence of Copper Impurity**: Granulated zinc often contains small amounts of copper as an impurity. This copper acts as a catalyst for the reaction. Catalysts are substances that increase the rate of a chemical reaction without being consumed in the process. The presence of copper helps to speed up the reaction between zinc and the acid, thus facilitating the production of hydrogen gas. ...
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