Question

What is the oxidation state of chlorine in \( \text{Cl}_2 \text{O}_7 \)?

• A. +7
• B. +5
• C. -1
• D. +3

Hint:

The sum of oxidation states in a neutral molecule must be zero. Use this principle to calculate oxidation states.

Answer 1

The Correct Option is A

In \( \text{Cl}_2 \text{O}_7 \), the oxygen atoms have an oxidation state of -2. Since the compound is neutral, the total oxidation state must be zero. Let the oxidation state of chlorine be \( x \). The total oxidation state is: \[ 2x + 7(-2) = 0 \] \[ 2x - 14 = 0 \] \[ 2x = 14 \quad \Rightarrow \quad x = +7 \] Therefore, the oxidation state of chlorine in \( \text{Cl}_2 \text{O}_7 \) is +7. So, the correct answer is option (1).