Acid reacts with metal to form salt and liberates _______________ gas.

Correct option is B

Acids react with metals to form salt and liberate hydrogen gas.

Explanation:
● When acids react with metals like zinc or magnesium, they produce a salt and release hydrogen gas.
● The reaction follows the formula:
Metal + Acid → Salt + Hydrogen gas.
● For example:
Zn + 2HCl → ZnCl₂ + H₂.

Information Booster:
● This reaction is commonly used in laboratories to demonstrate the properties of acids and gases.
● Hydrogen gas is colorless, odorless, and highly flammable.
● Strong acids like HCl and H₂SO₄ react more vigorously with metals compared to weaker acids.

Additional Information:

• (C) Carbon Dioxide: Produced when acids react with carbonates, not metals.