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When Acids React with Metal, Which Gas is Liberated? - CBSE Class 10 - Science

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Question

When acids react with metal, which gas is liberated?

Solution 1

If an acid reacts with any metal, a salt and hydrogen gas will be formed.

Metal + Acid → Salt + Hydrogen gas

Solution 2

Hydrogen gas is usually liberated when an acid reacts with a metal.

 Take few pieces of zinc granules and add 5 ml of dilute H2SO4. Shake it and pass the gas produced into a soap solution. The bubbles of the soap solution are formed. These soap bubbles contain hydrogen gas.
H2SO4 + Zn → ZnSO4 + H2 ↑
We can test the evolved hydrogen gas by its burning with a pop sound when a candle is brought near the soap bubbles.

  Is there an error in this question or solution?
Solution When Acids React with Metal, Which Gas is Liberated? Concept: Chemical Properties of Acids and Bases.
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