NDA 2025
- Exam
- NDA
- Year
- 2025
- Subject
- General Ability
- Chapter
- General Science
NDA 2025 · General Ability · General Science
Which one of the following statements regarding oxidation and...
Which one of the following statements regarding oxidation and reduction reactions is NOT correct?
Options
- AIf a substance loses hydrogen during reaction, it is reduced
- BIf a substance loses oxygen during reaction, it is reduced
- CIf a substance gains hydrogen during reaction, it is reduced
- DIf a substance gains oxygen during reaction, it is oxidized
Correct answer
A. If a substance loses hydrogen during reaction, it is reduced
Step-by-step solution
Oxidation is defined as the gain of oxygen or the loss of hydrogen by a substance during a chemical reaction.
Reduction is defined as the loss of oxygen or the gain of hydrogen by a substance during a chemical reaction.
Evaluating the given options:
Option (1) states that if a substance loses hydrogen, it is reduced. This is incorrect because the loss of hydrogen is oxidation.
Option (2) states that losing oxygen is reduction, which is correct.
Option (3) states that gaining hydrogen is reduction, which is correct.
Option (4) states that gaining oxygen is oxidation, which is correct.
Therefore, the statement in option (1) is not correct.
Answer: If a substance loses hydrogen during reaction, it is reduced
Reduction is defined as the loss of oxygen or the gain of hydrogen by a substance during a chemical reaction.
Evaluating the given options:
Option (1) states that if a substance loses hydrogen, it is reduced. This is incorrect because the loss of hydrogen is oxidation.
Option (2) states that losing oxygen is reduction, which is correct.
Option (3) states that gaining hydrogen is reduction, which is correct.
Option (4) states that gaining oxygen is oxidation, which is correct.
Therefore, the statement in option (1) is not correct.
Answer: If a substance loses hydrogen during reaction, it is reduced