Class 7 Exam > Class 7 Videos > Science Class 7 > Burning of Magnesium Ribbon as a Chemical Change
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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Nov 23, 2024 Last updated |
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