If a substance gains oxygen or loses hydrogen during a reaction, which of the following statement is true?
Answer & explanation
Correct answer: option 2
The correct answer is option 2. Substance is oxidised.
If a substance gains oxygen or loses hydrogen during a reaction, it is oxidized. In chemical reactions, oxidation involves the gain of oxygen or the loss of hydrogen, electrons, or other reducing agents. When a substance gains oxygen or loses hydrogen, it typically loses electrons, which is characteristic of oxidation. So, the correct answer is Substance is oxidised.