1.

Neodymium show +2, +3, and +4 oxidation state of +4 oxidation state. The most oxidising state known is aqueous solution is

Answer»

`+2`
`+3`
`+4`
none of these

SOLUTION :We know that, +3 oxidation is common in all series. Stable of +3 O.S. depends upon high HYDRATION energy, high lactic energy and high I.P.
`Nd^(2+)` - has configuration `4f^(4)`
`Nd^(4+)-` has configuration `4f^(2)`
HENCE `+2,+4` oxidation states are unstable in Nd in AQUEOUS solution.


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