Question:
How many lone pair of electrons are present on chlorine atom in chlorous acid ?
How many lone pair of electrons are present on chlorine atom in chlorous acid ?
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Count lone pairs by subtracting bonding electrons from total valence electrons of the central atom.
Updated On: Feb 2, 2026
- $4$
- $2$
- $1$
- $3$
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Formula of chlorous acid.
Chlorous acid has the molecular formula $\mathrm{HClO_2}$.
Step 2: Valence electrons of chlorine.
Chlorine has 7 valence electrons. In $\mathrm{HClO_2}$, chlorine forms two bonds with oxygen atoms.
Step 3: Lone pair calculation.
After bond formation, chlorine retains two lone pairs of electrons.
Step 4: Conclusion.
Thus, the number of lone pairs present on chlorine atom in chlorous acid is 2.
Chlorous acid has the molecular formula $\mathrm{HClO_2}$.
Step 2: Valence electrons of chlorine.
Chlorine has 7 valence electrons. In $\mathrm{HClO_2}$, chlorine forms two bonds with oxygen atoms.
Step 3: Lone pair calculation.
After bond formation, chlorine retains two lone pairs of electrons.
Step 4: Conclusion.
Thus, the number of lone pairs present on chlorine atom in chlorous acid is 2.
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