JEE MAIN - Chemistry (2019 - 9th April Evening Slot - No. 3)
The maximum number of possible oxidation
states of actinoides are shown by :
nobelium (No) and lawrencium (Lr)
actinium (Ac) and thorium (Th)
neptunium (Np) and plutonium (Pu)
berkelium (Bk) and californium (Cf)
Explanation
Actinoid 'Th' shows oxidation state = +4
Actinoid 'Ac' shows oxidation state = +3
Actinoid 'Pu' shows oxidation states = +3, +4, +5, +6, +7
Actinoid 'Np' shows oxidation states = +3, +4, +5, +6, +7
Actinoid 'Bk' shows oxidation states = +3, +4
Actinoid 'Cm' shows oxidation states = +3, +4
Actinoid 'Lr' shows oxidation states = +3
$$ \therefore $$ Maximum oxidation state is shown by Np and Pu.
Actinoid 'Ac' shows oxidation state = +3
Actinoid 'Pu' shows oxidation states = +3, +4, +5, +6, +7
Actinoid 'Np' shows oxidation states = +3, +4, +5, +6, +7
Actinoid 'Bk' shows oxidation states = +3, +4
Actinoid 'Cm' shows oxidation states = +3, +4
Actinoid 'Lr' shows oxidation states = +3
$$ \therefore $$ Maximum oxidation state is shown by Np and Pu.
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