Which of the following statements is correct?

Question

Question

This question was previously asked in

SSC CHSL Tier-I Exam 2022 Official Paper (Held On: 16 March, 2023 Shift 2)

Metals react with acids and produce metal salts and hydrogen gas.
Non-metals react with oxygen to produce non- metallic oxides which are basic in nature.
On burning, metals react with oxygen to produce metal oxides which are acidic in nature.
Less reactive metals displace more reactive metals from their compounds in aqueous solutions.

Answer 1

The correct answer is Metals react with acids and produce metal salts and hydrogen gas.

Key Points

When an acid reacts with metal, salt and hydrogen are produced:
- Acid + Metal → Salt + Hydrogen
- An example: Nitric acid + Calcium → Nitrate + Hydrogen.
- The salt that is produced depends upon which acid and which metal react.

Additional Information

Metals readily react with acid and produce hydrogen gas which burns with a pop sound.
Metals are placed above hydrogen in reactivity series and displace during a reaction with an acid.
As acids have a property of giving H+ ions.
A resultant is formed with the release of hydrogen gas.
It doesn't matter which metal or which acid is used if there is a reaction we always get hydrogen gas as well as salt.
However, how quickly the reaction goes depends on the metal used and how high up in the reactivity series it is.