A metal gives a gas with acid and the gas gives a pop sound near a burning splint. Which conclusion about the metal is correct?
Answer and explanation
Correct answer: The metal is more reactive than hydrogen
A burning splint producing a characteristic pop confirms that the gas is hydrogen. In the usual reaction of a metal with a dilute acid, the metal displaces hydrogen: metal + acid → salt + H₂. Such displacement is possible when the metal is above hydrogen in the reactivity series. Therefore option A is correct; carbonate is a compound, not a metal, and the other statements conflict with the test.
Frequently asked questions
What is the correct answer to this question?
The metal is more reactive than hydrogen
Why is this the correct answer?
A burning splint producing a characteristic pop confirms that the gas is hydrogen. In the usual reaction of a metal with a dilute acid, the metal displaces hydrogen: metal + acid → salt + H₂. Such displacement is possible when the metal is above hydrogen in the reactivity series. Therefore option A is correct; carbonate is a compound, not a metal, and the other statements conflict with the test.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Metals and Non-metals.
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