Which gas is released when an acid reacts with an active metal?
Answer and explanation
Correct answer: Hydrogen
An active metal can displace hydrogen from a dilute acid. The general reaction is metal + acid → salt + hydrogen gas; for example, Zn + 2HCl → ZnCl₂ + H₂. Thus option A is correct. Carbon dioxide is usually released when an acid reacts with a carbonate, while oxygen and nitrogen are not the normal gaseous products of this metal-acid reaction.
Frequently asked questions
What is the correct answer to this question?
Hydrogen
Why is this the correct answer?
An active metal can displace hydrogen from a dilute acid. The general reaction is metal + acid → salt + hydrogen gas; for example, Zn + 2HCl → ZnCl₂ + H₂. Thus option A is correct. Carbon dioxide is usually released when an acid reacts with a carbonate, while oxygen and nitrogen are not the normal gaseous products of this metal-acid reaction.
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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
