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NEET 2018
Exam
NEET
Year
2018
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

NEET 2018 · Chemistry · Classification of Elements and Periodicity in Properties

The correct order of atomic radii in group 13 elements is

The correct order of atomic radii in group 1313 elements is

Options

  1. AB<Ga<Al<Tl<InB < Ga < Al < Tl < In
  2. BB<Al<Ga<In<TlB < Al < Ga < In < Tl
  3. CB<Al<In<Ga<TlB < Al < In < Ga < Tl
  4. DB<Ga<Al<In<TlB < Ga < Al < In < Tl

Correct answer

A. B<Ga<Al<Tl<InB < Ga < Al < Tl < In

Step-by-step solution

In group 1313, due to inert electron pair effect of GaGa, the size order will be

[Al>Ga]\left[Al > Ga\right]

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