A gas is evolved when magnesium ribbon is added to dilute sulphuric acid. Which test is most suitable to identify this gas?
Answer and explanation
Correct answer: A burning splint gives a pop sound
The governing concept is the reaction of a metal with a dilute acid. Magnesium reacts with dilute sulphuric acid to form magnesium sulphate and hydrogen: Mg + H₂SO₄ → MgSO₄ + H₂. Hydrogen is identified by bringing a burning splint near the gas; it burns rapidly with a characteristic pop sound. Option A is a test for a basic gas, B is not specific, and D indicates carbon dioxide, so option C is correct.
Frequently asked questions
What is the correct answer to this question?
A burning splint gives a pop sound
Why is this the correct answer?
The governing concept is the reaction of a metal with a dilute acid. Magnesium reacts with dilute sulphuric acid to form magnesium sulphate and hydrogen: Mg + H₂SO₄ → MgSO₄ + H₂. Hydrogen is identified by bringing a burning splint near the gas; it burns rapidly with a characteristic pop sound. Option A is a test for a basic gas, B is not specific, and D indicates carbon dioxide, so option C is correct.
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.
