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Burning of Magnesium Ribbon as a Chemical Change Video Lecture | Science Class 7

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FAQs on Burning of Magnesium Ribbon as a Chemical Change Video Lecture - Science Class 7

1. What is the chemical equation for the burning of magnesium ribbon?
Ans. The chemical equation for the burning of magnesium ribbon is 2Mg + O2 -> 2MgO.
2. Why does magnesium ribbon burn during the reaction?
Ans. Magnesium ribbon burns during the reaction because it is highly reactive with oxygen. When the magnesium ribbon is heated, it combines with oxygen from the air to form magnesium oxide.
3. What are the physical changes observed during the burning of magnesium ribbon?
Ans. During the burning of magnesium ribbon, several physical changes can be observed. The ribbon starts to glow brightly, producing a white light. It also undergoes a change in color from silver to white as it reacts with oxygen. Additionally, the ribbon gradually disintegrates and turns into ash-like residue.
4. What are the properties of magnesium oxide formed during the burning of magnesium ribbon?
Ans. Magnesium oxide formed during the burning of magnesium ribbon has several properties. It is a white, powdery solid that is insoluble in water. It has a high melting point and is stable at high temperatures. Magnesium oxide is also known for its alkaline properties and can react with acids to form salts.
5. What are the applications of magnesium oxide formed from the burning of magnesium ribbon?
Ans. Magnesium oxide has various applications. It is commonly used in the production of refractory bricks, which are heat-resistant materials used in furnaces and kilns. Magnesium oxide is also utilized as an ingredient in medical antacids, as it can neutralize excess stomach acid. Furthermore, it is used as a component in some types of cement and as a supplement in livestock feed.
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