Which gas is generally produced when acids react with metals?
Answer and explanation
Correct answer: Hydrogen
The general reaction of a suitable metal with a dilute acid is: metal + acid → salt + hydrogen gas. For example, zinc reacts with hydrochloric acid to form zinc chloride and hydrogen. Thus option A is correct. Oxygen and nitrogen are not normally released in this reaction, while carbon dioxide is characteristic of acid–carbonate reactions rather than ordinary acid–metal reactions.
Frequently asked questions
What is the correct answer to this question?
Hydrogen
Why is this the correct answer?
The general reaction of a suitable metal with a dilute acid is: metal + acid → salt + hydrogen gas. For example, zinc reacts with hydrochloric acid to form zinc chloride and hydrogen. Thus option A is correct. Oxygen and nitrogen are not normally released in this reaction, while carbon dioxide is characteristic of acid–carbonate reactions rather than ordinary acid–metal reactions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
