Oxidation number of Fe in `Fe_(3)O_(4)`are:

Oxidation number of Fe in `Fe_(3)O_(4)`are:
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Answer :

Oxidation number of Fe in `Fe_(3)O_(4)`are: A. `+2 and +3` B. `+1 and +2` C. `+1 and +3` D. None
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Last Answer : `K_(2)Cr_(2)O_(7)` react with hydrazins to form product. The oxidation state of Cr in the product will be :- A. `+4` B. `+3` C. `+5` D. `+2`

The oxidation state of `Cr` in `Cr_(2)O_(7)^(2-)` is

Description : The oxidation state of `Cr` in `Cr_(2)O_(7)^(2-)` is

Last Answer : The oxidation state of `Cr` in `Cr_(2)O_(7)^(2-)` is A. `+2` B. `+6` C. `-6` D. `-4`

Compound (A) `C_(8)H_(9)Br`, gives a white precipitate when warmed with alcoholic `AgNO_(3)`. Oxidation of (A) gives an acid (B),`C_(8)H_(6)O_(4)`. (B

Description : Compound (A) `C_(8)H_(9)Br`, gives a white precipitate when warmed with alcoholic `AgNO_(3)`. Oxidation of (A) gives an acid (B),`C_(8)H_(6)O_(4)`. (B

Last Answer : Compound (A) `C_(8)H_(9)Br`, gives a white precipitate when warmed with alcoholic `AgNO_(3)`. Oxidation of ... . Identify the compound (A) A. B. C. D.