Which gas is produced when metal reacts with dilute acids?

Hydrogen

The correct answer is option 2. Hydrogen.

The gas produced when a metal reacts with a dilute acid is 2. Hydrogen.

Here's why:

Metal Reactivity: Most metals are more reactive than hydrogen and tend to lose electrons, forming positively charged ions (cations) when they react.

Acidic Nature: Dilute acids, like hydrochloric acid (HCl) or sulfuric acid (H₂SO₄), release hydrogen ions (H⁺) in water.

Reaction and Gas Production: When a metal reacts with a dilute acid, a single replacement reaction occurs. The metal displaces the hydrogen from the acid, forming a salt (ionic compound) and releasing hydrogen gas (H₂).

Therefore, the reaction between a metal and a dilute acid typically produces hydrogen gas as one of the products.