Question

1. what happens when a magnesium ribbon is heated in the presence of air.
2. what happens when a copper vessel is exposed in moist air?
3. explain the reaction of sodium and water, with the help of an activity?
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Answer 1

Answer:

1. mgo will formed
2. There will formed a green layer over it due to the corrosion
3. do yourself

Explanation:

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Answer 2

Answer:

Explanation:

1.When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide. After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction.

2.When a copper vessel is exposed to moist air for a long time it develops a green layer on its surface. Copper corrodes by oxidation in which it reacts with oxygen in the air to form copper oxide. Copper oxide then combines with carbon dioxide to make copper carbonate, which gives it a green colour.