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NEET CHEMISTRYP Block ElementsMedium

Question

The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence?

A

Ga < In < Al < Tl

B

Al < Ga < In < Tl

C

Tl < In < Ga < Al

D

In < Tl < Ga < Al

Step-by-Step Solution

In Group 13 elements, as we move down the group, the tendency of the ns² valence electrons to remain paired and not participate in bonding increases due to the poor shielding effect of the intervening d and f orbitals. This phenomenon is known as the inert pair effect. Consequently, the stability of the lower oxidation state (+1) increases down the group, while the stability of the higher oxidation state (+3) decreases. Thus, the increasing order of stability of the +1 oxidation state is Al < Ga < In < Tl.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from P Block Elements. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYP Block Elementsstabilityoxidationincreasessequence

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