During the reaction of some metals with dilute hydrochloric acid, following observations were made.
Some bubbles of a gas are seen when lead (Pb) is reacted with the acid.
Explain these observations giving suitable reasons.

Explanation

**Step-by-Step Solution:**

1. **Identify the Reactants**: The reaction involves lead (Pb) and dilute hydrochloric acid (HCl).

2. **Understand the Reaction Type**: This is a displacement reaction. In a displacement reaction, a more reactive metal displaces a less reactive metal from its compound.

3. **Reactivity of Lead**: Lead is more reactive than hydrogen. In the reactivity series of metals, metals that are more reactive can displace less reactive metals from their compounds.

...