Question:
What is oxidation state of chlorine in chlorous acid?
What is oxidation state of chlorine in chlorous acid?
Show Hint
Write the formula HClO2 and balance charges to zero.
Updated On: Oct 1, 2026
- \(+2\)
- \(+4\)
- \(+3\)
- \(+7\)
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Write the formula
Chlorous acid is \(HClO_2\). Hydrogen is \(+1\) and oxygen is \(-2\).
Step 2: Solve
Let the oxidation state of chlorine be \(x\). Sum of oxidation numbers is zero:
\[ (+1) + x + 2(-2) = 0 \]
\[ x = +3 \]
Step 3: Check the options
\(+2\) is not found in chlorine oxoacids. \(+4\) is in \(ClO_2\). \(+7\) is in perchloric acid \(HClO_4\), where \(1 + x - 8 = 0\).
Final Answer:
Chlorine has oxidation state +3 in chlorous acid. \[ \boxed{\text{(C)}\ +3} \]
Chlorous acid is \(HClO_2\). Hydrogen is \(+1\) and oxygen is \(-2\).
Step 2: Solve
Let the oxidation state of chlorine be \(x\). Sum of oxidation numbers is zero:
\[ (+1) + x + 2(-2) = 0 \]
\[ x = +3 \]
Step 3: Check the options
\(+2\) is not found in chlorine oxoacids. \(+4\) is in \(ClO_2\). \(+7\) is in perchloric acid \(HClO_4\), where \(1 + x - 8 = 0\).
Final Answer:
Chlorine has oxidation state +3 in chlorous acid. \[ \boxed{\text{(C)}\ +3} \]
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