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99 Percentile Qs Bank for JEE MainChemistryp Block Elements (Group 13 & 14)

The stability of +1 oxidation state increases in the sequence

Options

  1. ATl   <   In   <   Ga   <   Al
  2. BIn   <   Tl   <   Ga   <   Al
  3. CGa   <   In   <   Al   <   Tl
  4. DAl   <   Ga   <   In   <   Tl

Correct answer

D. Al   <   Ga   <   In   <   Tl

Step-by-step solution

Group -   13 elements exhibit + 3 and + 1 oxidation states. Stability of the lower oxidation state increases on moving down the group due to inert pair effect. Al +   <   Ga +   <   In +   <   Tl +  

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