Question

The oxidation number of chlorine in $ \text{Cl}_2 \text{O} $ is:

• A. \( +1 \)
• B. \( -1 \)
• C. \( 0 \)
• D. \( +3 \)

Hint:

Remember: In compounds, the sum of oxidation states of all elements must equal the overall charge of the molecule. Oxygen typically has an oxidation state of \( -2 \).

Answer 1

The Correct Option is A

Step 1: Recall the oxidation number rules
In a molecule, the sum of the oxidation states of all atoms must be zero. 
For oxygen, the oxidation number is usually \( -2 \), and for chlorine, it can vary. 
Step 2: Assign oxidation numbers
In \( \text{Cl}_2 \text{O} \), there are two chlorine atoms and one oxygen atom. 
- Let the oxidation number of chlorine be \( x \). 
- The oxidation number of oxygen is \( -2 \). 
The sum of oxidation numbers in \( \text{Cl}_2 \text{O} \) must be zero: \[ 2x + (-2) = 0 \] \[ 2x - 2 = 0 \] \[ 2x = 2 \] \[ x = +1 \] 
Answer:
Therefore, the oxidation number of chlorine in \( \text{Cl}_2 \text{O} \) is \( +1 \). So, the correct answer is option (1).