Hydrogen gas is identified by what?
Answer and explanation
Correct answer: By a pop sound near a burning splint
Hydrogen is a combustible gas. When a small amount is brought into contact with a burning splint, it burns rapidly and produces a characteristic ‘pop’ sound, so option B is the identification test. Limewater turning milky indicates carbon dioxide. Turmeric and phenolphthalein are indicators of basic conditions, not specific tests for hydrogen gas. The test must be performed carefully because hydrogen-air mixtures can be explosive.
Frequently asked questions
What is the correct answer to this question?
By a pop sound near a burning splint
Why is this the correct answer?
Hydrogen is a combustible gas. When a small amount is brought into contact with a burning splint, it burns rapidly and produces a characteristic ‘pop’ sound, so option B is the identification test. Limewater turning milky indicates carbon dioxide. Turmeric and phenolphthalein are indicators of basic conditions, not specific tests for hydrogen gas. The test must be performed carefully because hydrogen-air mixtures can be explosive.
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.
