C) Halide ores - Silver (Horn silver, AgCl)Why it's correct: Horn silver consists of silver and chlorine (a halogen). Because the dominant anion is a halide ($Cl^-$), it is correctly classified as a halide ore.Incorrect Pairs ExplainedA) Sulphate ores - Iron (Iron pyrites, $FeS_2$)Why it's incorrect: Iron pyrites ($FeS_2$) is a sulfide ore, not a sulfate ore. Sulfates contain the $SO_4^{2-}$ group, while pyrites contain sulfur directly bonded to iron as a sulfide.B) Oxide ores - Zinc (Hemimorphite, $2ZnO \cdot SiO_2 \cdot H_2O$)Why it's incorrect: Hemimorphite is primarily classified as a silicate ore because its chemical structure is built around silicon and oxygen ($SiO_4$ groups), rather than being a simple oxide.D) Silicate ores - Lead (Anglesite, $PbSO_4$)Why it's incorrect: Anglesite ($PbSO_4$) contains the sulfate group ($SO_4^{2-}$), making it a sulfate ore, not a silicate ore.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
