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JEE Main 20248 AprilMorning Shift
Exam
JEE Main
Year
2024
Date
8 April
Shift
Morning Shift
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

JEE Main 2024 · 8 April · Morning Shift · Chemistry · p Block Elements (Group 13 & 14)

Give below are two statements: One is labelled as Assertion (A) and...

Give below are two statements: One is labelled as Assertion (\mathrm{A}) and the other is labelled as Reason R: Assertion A: The stability order of +1 oxidation state of Ga, In and T1 is (\mathrm{Ga} < \mathrm{In} <) T1. Reason R: The inert pair effect stabilizes the lower oxidation state down the group. In the light of the above statements, choose the correct answer from the options given below:

Options

  1. A(\mathrm{A}) is true but (\mathrm{R}) is false.
  2. B(\mathrm{A}) is false but (\mathrm{R}) is true.
  3. CBoth (A\mathrm{A}) and (R\mathrm{R}) are true and (R\mathrm{R}) is the correct explanation of (A\mathrm{A}).
  4. DBoth (A\mathrm{A}) and (R\mathrm{R}) are true but (R\mathrm{R}) is NOT the correct explanation of (A\mathrm{A}).

Correct answer

C. Both (A\mathrm{A}) and (R\mathrm{R}) are true and (R\mathrm{R}) is the correct explanation of (A\mathrm{A}).

Step-by-step solution

The relative stability of +1 oxidation state progressively increases for heavier elements due to inert pair effect. ∴\therefore Stability of Aℓ+1<Ga+1<In+1<Tℓ+1\mathrm{A} \ell^{+1} < \mathrm{Ga}^{+1} < \mathrm{In}^{+1} < \mathrm{T} \ell^{+1}
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