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Per NCERT §7.3 Problem 7.3 (Stock notation), the iron in Fe₂O₃ is best written with which Roman numeral?
AFe(I)
BFe(IV)
CFe(III)
DFe(II)
Answer & Solution
Correct answer: C. Fe(III)
NCERT Problem 7.3: O = −2 ⇒ each Fe = +3, so Fe₂(III)O₃ in Stock notation.
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