The stability of +1 oxidation state increases in the sequence:
A
`Tl lt In lt Ga lt Al`
B
`In lt Tl lt Ga lt Al`
C
`Ga lt In lt Al lt Tl`
D
`Al lt Ga lt In lt Tl`
Text Solution
Verified by Experts
The correct Answer is:
D
Due to the inert pair effect, group 13 elements show +1 oxidation state also besides the group oxidation state +3, and the stability of lower oxidation state, ie, +1, increases down the group `(darr)`. Order of Lewis acid strength of boron trihalides : `BI_3 gt B Br_3 gt BCl_3 gt BF_3`.
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