Rust is chemically known as? EASY 1 Point -0.25 Negative MCQ #1312 Chemistry Sciences PPSC Provincial PSCs Question Rust is chemically known as? Options A Iron(II) oxide (FeO) B Iron(III) oxide-hydroxide (Fe₂O₃·H₂O) C Iron carbonate D Iron sulphide Reveal Answer Reset 📝 Explanation Rust is hydrated iron(III) oxide-hydroxide (Fe₂O₃·H₂O or FeO(OH)·Fe(OH)₃). It forms when iron is exposed to oxygen and water through an electrochemical process. ← Previous MCQ📋 All MCQs📚 LearnNext MCQ → Related MCQs EASY The longest bone in the human body is MEDIUM The smallest bone in the human body is EASY The heart is located in