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QJEEM17Chabdb: JEE Main 2017 Chemistry - Class 12 JEEM17Chabdb Solution: Consider the following standard electrode potentials (E o in…

Consider the following standard electrode potentials (Eo in volts) in aqueous solution :

Element M3+ /M M+ /M
A1 -1.66 + 0.55
T1 +1.26 - 0.34


Based on these data, which of the following statements is correct ?

Multiple Choice Options

  • A T13+ is more stable than A13+
  • B T1+ is more stable than A13+
  • C A1+ is more stable than A13+
  • D T1 + is more stable than A1+

Step-by-Step Verified Solution

The standard electrode potential E0 for M+/M become negative for Tl which indicates that Tl+ is more stable than Al+.

This can also be be explained by inert pair effect. The atoms of this group have an outer electronic configuration of s2p1. The two s electrons of Tl do not participate in bonding due to poor shielding of d electrons.

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