p-Block Elements-I 1 Question 6
6. Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in +1 and +3 oxidation states. This is due to
(2019 Main, 9 Jan I)
(a) lattice effect
(b) lanthanoid contraction
(c) inert pair effect
(d) diagonal relationship
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Answer:
Correct Answer: 6. (c)
Solution:
- Due to inert pair effect, group-13 elements
- +3 oxidation states
- +1 oxidation states
