Magnesium gives gas rapidly with acid while silver generally does not. What is the reason?
Answer and explanation
Correct answer: Magnesium is more reactive than silver
The gas is generally hydrogen, released when a sufficiently reactive metal displaces hydrogen from a dilute acid. Magnesium lies above hydrogen in the reactivity series, so it reacts readily, for example Mg + 2HCl → MgCl₂ + H₂. Silver lies below hydrogen and usually cannot displace it from dilute non-oxidising acids. Magnesium is a metal, so option A gives the correct reason.
Frequently asked questions
What is the correct answer to this question?
Magnesium is more reactive than silver
Why is this the correct answer?
The gas is generally hydrogen, released when a sufficiently reactive metal displaces hydrogen from a dilute acid. Magnesium lies above hydrogen in the reactivity series, so it reacts readily, for example Mg + 2HCl → MgCl₂ + H₂. Silver lies below hydrogen and usually cannot displace it from dilute non-oxidising acids. Magnesium is a metal, so option A gives the correct reason.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Metals and Non-metals. Topic: Reactivity series.
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