Why is magnesium ribbon cleaned before burning?
Answer and explanation
Correct answer: To remove the magnesium oxide layer from its surface
On exposure to air, a thin layer of magnesium oxide forms on the surface of magnesium ribbon. This coating prevents direct contact between magnesium and oxygen. Cleaning the ribbon with sandpaper removes the oxide layer, so magnesium burns readily and forms magnesium oxide. Cleaning does not increase its melting point or produce oxygen.
Frequently asked questions
What is the correct answer to this question?
To remove the magnesium oxide layer from its surface
Why is this the correct answer?
On exposure to air, a thin layer of magnesium oxide forms on the surface of magnesium ribbon. This coating prevents direct contact between magnesium and oxygen. Cleaning the ribbon with sandpaper removes the oxide layer, so magnesium burns readily and forms magnesium oxide. Cleaning does not increase its melting point or produce oxygen.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
