Question

Which of the following is true regarding oxidation?

• A. loss of electron by an atom.
• B. gain of electron by an atom.
• C. addition of electron to an atom.
• D. addition of electropositive elements.

Hint:

In electronic terms oxidation means loss of electrons and reduction means gain of electrons.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
Oxidation is the loss of one or more electrons by an atom or ion, which raises its oxidation number.

Step 2: Example
\(\text{Na} \rightarrow \text{Na}^{+} + e^{-}\) is oxidation.

Step 3: Compare the options
Gain of electrons, addition of electrons and addition of electropositive elements all describe reduction. Only loss of electrons describes oxidation.

Final Answer:
Oxidation is the loss of electron by an atom. \[ \boxed{\text{(A) }\text{loss of electron by an atom}} \]