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The electropositive character increases ...

The electropositive character increases from B to Al and then decreases from Al to Tl because of

A

Increase in the size of the elements

B

Decrease in the ionization energy of the elements

C

Decrease in the electronegativity of the elements

D

Ineffective shielding of the nuclear charge by d - electrons in the case of Ga, In and Tl

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The correct Answer is:
D
Due to ineffective shielding of the nuclear charge by d - electrons in the case of Ga, In and Tl
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