Question:
Which gas is liberated when an acid reacts with a metal?
Which gas is liberated when an acid reacts with a metal?
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Metal + Dilute Acid \(\rightarrow\) Salt + Hydrogen Gas
Hydrogen can be identified by the characteristic "pop" sound when a burning splint is brought near it.
Updated On: Jun 3, 2026
- Hydrogen
- Oxygen
- Carbon dioxide
- Nitrogen Correct Answer: (A) Hydrogen Solution:
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Concept:
Metals react with dilute acids to form a salt and hydrogen gas.
The general reaction is
\[
\text{Metal}+\text{Acid}
\rightarrow
\text{Salt}+H_2\uparrow
\]
The upward arrow indicates the evolution of a gas.
Step 1: Recall a common reaction. For example, zinc reacts with hydrochloric acid as follows: \[ Zn + 2HCl \rightarrow ZnCl_2 + H_2 \] Hydrogen gas is released during the reaction.
Step 2: Consider another example. Magnesium reacts with dilute sulphuric acid: \[ Mg + H_2SO_4 \rightarrow MgSO_4 + H_2 \] Again, hydrogen gas is evolved.
Step 3: Identify the liberated gas. In general, active metals displace hydrogen from acids. Therefore, the gas produced is \[ \boxed{\text{Hydrogen}} \] Hence, the correct option is \(\boxed{(A)}\).
Step 1: Recall a common reaction. For example, zinc reacts with hydrochloric acid as follows: \[ Zn + 2HCl \rightarrow ZnCl_2 + H_2 \] Hydrogen gas is released during the reaction.
Step 2: Consider another example. Magnesium reacts with dilute sulphuric acid: \[ Mg + H_2SO_4 \rightarrow MgSO_4 + H_2 \] Again, hydrogen gas is evolved.
Step 3: Identify the liberated gas. In general, active metals displace hydrogen from acids. Therefore, the gas produced is \[ \boxed{\text{Hydrogen}} \] Hence, the correct option is \(\boxed{(A)}\).
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