1
Minerals containing iron are’
(A) . Hematite
(B) . Goethite
(C) . Sphalerite
(D) . Magnetite
Choose the correct answer from the options given below:
EXPLANATION
Irrigation Water Quality Standards
- Hematite (A): Ferric oxide mineral ($\alpha\text{-Fe}_2\text{O}_3$), responsible for prominent red coloration in tropical red soils (Alfisols).
- Goethite (B): Iron oxyhydroxide mineral ($\alpha\text{-FeO(OH)}$), the most common pedogenic iron oxide imparting brown and yellowish hues to weathered soils.
- Magnetite (D): Ferrous-ferric spinelloid magnetic oxide mineral ($\text{Fe}_3\text{O}_4$), common heavy mineral accessory in igneous and metamorphic rocks.
- Sphalerite (C): Zinc sulfide mineral ($(\text{Zn,Fe})\text{S}$), primarily an ore of zinc rather than an iron mineral.
- Conclusion: Hematite (A), Goethite (B), and Magnetite (D) are iron-containing minerals. (Correct answer: Option 1)
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