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Which gas is usually liberated when an a...

Which gas is usually liberated when an acid reacts with a metal ? Illustrate with an example. How will you test for the presence of this gas ?

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Hydrogen gas is usually liberated when an acid reacts with a metal.
Take few pieces of zinc granules in a test tube and add 5 ml of diliute HCl. Shake it well. Tiny bubbles rise up in the solution. Pass this gas produced into a soap solution. Soap bubbles are formed. These soap bubbles contain gas.
We can test if the gas evolved is hydrogen gas by bringing a burning splint near the soap bubble. The gas in the bubble burns with a pop sound proving that the gas is Hydrogen.
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ZEN PUBLICATION-ACIDS, BASES, AND SALTS-ZEN ADDITOINAL QUESTIONS SECTIONS (Long Answer Type Questions)
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  18. How can the change in pH in the river water affect the living organism...

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  19. Baking powder I used for baking. If your mother uses baking soda inste...

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