MEDIUMMCQ SINGLENEET ChemistryInorganic Chemistryp-Block (group 13 and 14)Introduction to p-block Elements

Electropositive charcter for the elements of group 13 follows the order

A.B > Al > Ga > In > Tl

B.B < Al < Ga < In < Tl

C.B < Al > Ga < In > Tl

D.B < Al > Ga > In > Tl✓ Correct

Explanation

Due to smaller size and high ionisation potential of B than Al, the electropositive character increases from boron to aluminium. Due to poor shielding effect of d –electrons from Ga to Tl, the electropositive character decreases from Ga to Tl. The correct order of electropositive character is B < Al > Ga > In > Tl

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