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Question:
Which does not replace hydrogen from $ HCl $ ?
Which does not replace hydrogen from $ HCl $ ?
Updated On: Jul 28, 2022
- $ Cu $
- $ Mg $
- $ Na $
- $ Al $
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The Correct Option is A
Solution and Explanation
Copper does not replace hydrogen from $ HCl $ because in electrochemical series, it is present below hydrogen. $Al, Na$ and $Mg$ are present above hydrogen in electrochemical series, so they replace hydrogen.
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Concepts Used:
Preparation of Dihydrogen
Laboratory Preparation of Dihydrogen is given below:
- Reacting Zinc with Acid - One common way to produce or prepare dihydrogen gas in the lab is by reacting Zinc with a diluted acid.
\(Zn + H_2SO_4 → ZnSO_4 + H_2\)
\(Zn +HCl → ZnCl_2 + H_2\)
- Reacting Zinc with Alkaline - Zinc can also react with an aqueous alkali such as Sodium Hydroxide, The sodium and zinc will combine and produces dihydrogen as another product. The reaction is given as:
\(Zn + 2NaOH → Na_2ZnO_2 + H_2\)
- Commercial Preparation of Dihydrogen - The commercial preparation of hydrogen is a huge industry due to the high demand for hydrogen in the production of fertilizers and the oil-refining process.
- Electrolysis of Water
- Lane’s Process
- From Natural Gas
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