Single Choice

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

AII, III in haematite and III in magnetite
BII, III in haematite and II in magnetite
CII in haematite and II, III in magnetite
DIII in haematite and II, III in magnetite
Correct Answer

Solution

In haematite $$(Fe_2O_3)$$, Fe is present in (III) oxidation state and in magnetite $$(Fe_3O_4)$$, Fe is present in (II) and (III) oxidation state.

SIMILAR QUESTIONS

Redox Reactions

When chlorine is passed through hot concentrated caustic soda solution, the oxidation number of chlorine in one of the products increases from:

Redox Reactions

Characteristic oxidation number of atoms in free metal is

Redox Reactions

The oxidation states of sulphur in the anions, $$SO_{3}^{2-}$$, $$S_{2}O_{4}^{2-}$$ and $$S_{2}O_{6}^{2-}$$ follow the order :

Redox Reactions

Oxygen exhibits 0 oxidation state in:

Redox Reactions

The correct statement for the molecule $$ CsI_{3}$$ is that:

Redox Reactions

Which among the following shows maximum oxidation state?

Redox Reactions

Amongst the following, identify the species with an atom in $$+6$$ oxidation state.

Redox Reactions

The oxidation number of N and $$\displaystyle Cl$$ in $$\displaystyle NOCl{ O }_{ 4 }$$ respectively are :

Redox Reactions

Identify Z in the reaction given below: $$2Mn{ O}^-_4+5H_2O_2+6H^+\rightarrow 2Z+5O_2+8H_2O$$

Redox Reactions

Among the following, the correct order of acidity is

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