In which situation is a substance considered to be oxidised?
Answer and explanation
Correct answer: Oxygen is added to it
At the school-level definition, oxidation means the addition of oxygen to a substance, so option B is correct. For example, magnesium combines with oxygen to form magnesium oxide. Removal of oxygen, addition of hydrogen, and gain of electrons are commonly used indicators of reduction. In the electron-transfer definition, oxidation involves loss of electrons, which also distinguishes it from option D.
Frequently asked questions
What is the correct answer to this question?
Oxygen is added to it
Why is this the correct answer?
At the school-level definition, oxidation means the addition of oxygen to a substance, so option B is correct. For example, magnesium combines with oxygen to form magnesium oxide. Removal of oxygen, addition of hydrogen, and gain of electrons are commonly used indicators of reduction. In the electron-transfer definition, oxidation involves loss of electrons, which also distinguishes it from option D.
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.
