JEE PYQ: P Block Elements Question 65
Question 65 - 2019 (09 Jan Shift 1)
Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in +1 and +3 oxidation states. This is due to:
(1) inert pair effect
(2) diagonal relationship
(3) lattice effect
(4) lanthanoid contraction
Show Answer
Answer: (1)
Solution
Due to the inert pair effect, thallium exists in more than one oxidation state. Also, for thallium +1 oxidation state is more stable than +3 oxidation state.
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