1.

The acidic, basic or amphoric nature of Mn_(2)O_(7), V_(2)O_(5) and CrO are respectively.

Answer»

acidic , acidic and basic
basic, amphoteric and acidic
acidic , amphoteric and basic
acidic, basic and amphoteric

Solution :Acidiccharacter increases`//` basic characterdecreases with increase in OXIDATION state`OVERSET(+7) (MN)_(2)O_(7)` (acidic), `overset(+5)(V_(2))O_(5)` ( amphoteric), `overset(+2)(Cr)O` (basic `(V_(2)O_(3)rarr` basic , `V_(2)O_(4) rarr` LESS basic, `V_(2)O_(5) rarr `amphoteric )


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