Why does removing the layer formed on the surface of a magnesium ribbon make its burning clearer?
Answer and explanation
Correct answer: Removing the oxide layer increases direct contact between magnesium and oxygen
A thin layer of magnesium oxide forms on the surface of a magnesium ribbon. This layer hinders direct contact between magnesium and oxygen in air. When the layer is removed, fresh magnesium is exposed and reacts readily with oxygen, burning with a bright flame. The amount of oxygen in the air does not increase; only the exposed magnesium surface becomes available for reaction.
Frequently asked questions
What is the correct answer to this question?
Removing the oxide layer increases direct contact between magnesium and oxygen
Why is this the correct answer?
A thin layer of magnesium oxide forms on the surface of a magnesium ribbon. This layer hinders direct contact between magnesium and oxygen in air. When the layer is removed, fresh magnesium is exposed and reacts readily with oxygen, burning with a bright flame. The amount of oxygen in the air does not increase; only the exposed magnesium surface becomes available for reaction.
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.
