Question:
Among the following, the least polarised anion is:
Among the following, the least polarised anion is:
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The weakest conjugate base of the strongest acid is least polarisable.
Updated On: Jul 3, 2026
- \(NO_3^-\)
- \(SO_4^{2-}\)
- \(ClO_4^-\)
- \(C_2O_4^{2-}\)
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The Correct Option is C
Solution and Explanation
Step 1: Higher charge (SO4 2-, C2O4 2-) means more polarisable, ruled out first.
Step 2: Between NO3- and ClO4-: HClO4 is a very strong acid, so ClO4- is an extremely weak base, holding electron density tightly.
Step 3: Weak base = least polarisable.
\[\boxed{ClO_4^-}\]Was this answer helpful?
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