Which gas is generally formed in the reaction of an acid with an active metal?
Answer and explanation
Correct answer: Hydrogen
An active metal displaces hydrogen from a dilute acid. The general reaction is: metal + acid → salt + hydrogen gas. For example, zinc reacts with dilute hydrochloric acid as Zn + 2HCl → ZnCl₂ + H₂. Thus option A is correct. Carbon dioxide is typically released when an acid reacts with a carbonate, while oxygen and chlorine are not the general products of an acid-active-metal reaction.
Frequently asked questions
What is the correct answer to this question?
Hydrogen
Why is this the correct answer?
An active metal displaces hydrogen from a dilute acid. The general reaction is: metal + acid → salt + hydrogen gas. For example, zinc reacts with dilute hydrochloric acid as Zn + 2HCl → ZnCl₂ + H₂. Thus option A is correct. Carbon dioxide is typically released when an acid reacts with a carbonate, while oxygen and chlorine are not the general products of an acid-active-metal 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.
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