Question

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♦ Explain preparation of hydrogen.
♦ Explain Application of Activity series in the preparation of hydrogen
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Answer 1

Explanation:

1. Hydrogen is produced when granulated zinc is reacted with dilute hydrochloric acid. This is a general procedure for producing hydrogen. Besides, hydrogen can also be prepared by reacting zinc with aqueous alkali. The following reaction explains it by making this clear.

Answer 2

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Preparation of Hydrogen Gas

Step 1: Take a few grams of zinc granules and place them in a 500 mL flask.

Step 2: With the help of a thistle funnel, add dilute hydrochloric acid to the zinc granules. If hydrochloric acid isn’t available, dilute sulphuric acid can be used as an alternative.

Step 3: Hydrogen gas will be automatically collected with the help of a delivery tube via the downward displacement of water. This can be explained by the fact that hydrogen gas is lighter than water.

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It is used to determine the products of single displacement reactions, whereby metal A will replace another metal B in a solution if A is higher in the series. ... Therefore the elemental metal will "displace" the ionic metal and the two swap places. Only a metal higher in the reactivity series will displace another.

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