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NEET 2023
Exam
NEET
Year
2023
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

NEET 2023 · Chemistry · Classification of Elements and Periodicity in Properties

Taking stability as the factor, which one of the following...

Taking stability as the factor, which one of the following represent the correct relationship?

Options

  1. ATlI>TlI3TlI > {TlI}_{3}
  2. BTlCl3>TlCl{TlCl}_{3} > TlCl
  3. CInI3>InI{InI}_{3} > InI
  4. DAlCl>AlCl3AlCl > {AlCl}_{3}

Correct answer

A. TlI>TlI3TlI > {TlI}_{3}

Step-by-step solution

Due to the inert pair effect, +1 state stability increases down the group and +3 state stability decreases down the group. Hence, Tl+{Tl}^{+} is more stable than Tl3+{Tl}^{3 +}. Hence, TlITlI is more stable than TlI3{TlI}_{3}.

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