(D) Haematite is $Fe_2O_3$,where the oxidation state of iron is $+3$.Magnetite is $Fe_3O_4$,which is a mixed oxide represented as $FeO \cdot Fe_2O_3$.

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$III$ in haematite and $II, III$ in magnetite

(D) Haematite is $Fe_2O_3$,where the oxidation state of iron is $+3$.Magnetite is $Fe_3O_4$,which is a mixed oxide represented as $FeO \cdot Fe_2O_3$.In $FeO$,the oxidation state of iron is $+2$,and in $Fe_2O_3$,it is $+3$.Therefore,the oxidation states of iron in haematite and magnetite are $III$ and $II, III$ respectively.

Class 12 Chemistry d-and f-Block Elements Compounds of Transitional elements

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Oxidation states of the metal in the minerals haematite and magnetite,respectively,are

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A
$II, III$ in haematite and $III$ in magnetite
B
$II, III$ in haematite and $II$ in magnetite
C
$II$ in haematite and $II, III$ in magnetite
D
$III$ in haematite and $II, III$ in magnetite

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d-and f-Block Elements

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Compounds of Transitional elements

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Oxidation states of the metal in the minerals haematite and magnetite,respectively,are

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Which one of the following sulphides is yellow?

The fusion of chromite ore $(FeCr_{2}O_{4})$ with $Na_{2}CO_{3}$ in air gives a yellow solution upon addition of water. Subsequent treatment with $H_{2}SO_{4}$ produces an orange solution. The yellow and orange colours,respectively,are due to the formation of

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