Why should a magnesium ribbon be cleaned before it is burnt in air?

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Why should a magnesium ribbon be cleaned before it is burnt in air?

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Class 10 science ashishqna 3 years 2021-11-06T00:27:10+00:00 2021-11-06T00:27:10+00:00 1 Answer 18 views Tech Professional 0

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Reactive metals can displace less reactive metals from their compounds in solution or molten form. all metals are not equally reactive. We checked the reactivity of various metals with oxygen, water and acids. But all metals do not react with these reagents. Displacement reactions give better evidence about the reactivity of metals. It is simple and easy if metal A displaces metal B from its solution, it is more reactive than B. The reactivity series is a list of metals arranged in the order of their decreasing activities.
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ashishqna Tech Professional · Answer 1 · 2021-11-06T00:30:05+00:00

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2021-11-06T00:30:05+00:00 November 6, 2021 at 12:30 am

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Magnesium is a very reactive metal. When stored, it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen. The magnesium ribbon is cleaned by sand paper for removing this layer so that the underlying metal can be exposed to air.

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Why should a magnesium ribbon be cleaned before it is burnt in air?