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The electropositive first increases from...

The electropositive first increases from B to Al and then decreases from Al to Tl own the group because of

A

decrease in ionization energy of the elements

B

increase in size of the elements

C

ineffective shielding of nuclear charge by d-electrons in case of Ga, In and Tl due to which the valence electrons are tightly held and are not lost easily.

D

decrease in electronegatively of the elements.

Text Solution

Verified by Experts

The correct Answer is:
C
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