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Chemistry · CHEMICAL BONDING AND MOLECULAR STRUCTURE
हिन्दीAccording to Fajans' rules, which of the following pairs of cations exhibits the greater polarising power for the first member of the pair over the second, primarily due to pseudo-noble gas configuration rather than ionic charge or size?
Correct answer · Option 1
\( \text{Cu}^+ \) compared to \( \text{Na}^+ \)
Explanation
Cations with \( (n-1)d^{10}ns^0 \) configuration (like \( \text{Cu}^+ \)) have significantly higher polarising power than noble gas \( ns^2 np^6 \) cations of comparable size and identical charge (like \( \text{Na}^+ \)).
