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Give reasons: The stability of +3 oxidat...

Give reasons: The stability of +3 oxidation state of 13 group elements decreases down the group.

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The correct Answer is:
`2Al+2NaOH+6H_(2)Oto2Na[Al(OH)_(4)]+3H_(2)`
The stability of +3 oxidation state of group 13 elements decreases down the group due to the inert pair effect on ns2 electrons. This is because of the poor shielding effect of electron in d and f orbitals.
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