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JEE Main 201911 JanuaryEvening Shift
Exam
JEE Main
Year
2019
Date
11 January
Shift
Evening Shift
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

JEE Main 2019 · 11 January · Evening Shift · Chemistry · p Block Elements (Group 13 & 14)

The relative stability of +1 oxidation state of group 13 elements...

The relative stability of +1 oxidation state of group 13 elements follows the order

Options

  1. AAl<Ga<Tl<In\mathrm{Al} < \mathrm{Ga} < \mathrm{Tl} < \mathrm{In}
  2. BT1<In<Ga<Al\mathrm{T} 1 < \mathrm{In} < \mathrm{Ga} < \mathrm{Al}
  3. CGa<Al<ln⁡<Tl\mathrm{Ga} < \mathrm{Al} < \ln < \mathrm{Tl}
  4. DAl<Ga<In<Tl\mathrm{Al} < \mathrm{Ga} < \mathrm{In} < \mathrm{Tl}

Correct answer

D. Al<Ga<In<Tl\mathrm{Al} < \mathrm{Ga} < \mathrm{In} < \mathrm{Tl}

Step-by-step solution

Due to inert pair effect, the stability of +1 oxidation state increases down the group. Thus, correct order of stability is Al<Ga<In<Tl\mathrm{Al} < \mathrm{Ga} < \mathrm{In} < \mathrm{Tl}
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