What is the correct order of ionisation energy?

B > Al < Ga > In < Tl

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B < Al > Ga > In > Tl

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B > Al > Ga > In >Tl

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B > Al < Ga < In < Tl

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Solution

The correct option is C B > Al > Ga > In >Tl
In the group of Boron, as we move down ionic radii increase thereby decreasing ionisation potential/energy, as larger the radii more loosely held is the outermost $e^{-}$ .

$∴ B > A l > G a > I n > T l$

Hence, the correct option is $C$

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Similar questions

A l^{+}, G a^{+}, I n^{+}, T l^{+}

B > T l > I n > G a > A l

T l > I n > G a > B > A l

+ 1

A l

G a

I n

T l

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