JEE Advance - Chemistry (2015 - Paper 1 Offline - No. 1)
Match the anionic species given in Column-I that are present in the ore(s) given in Column-II
| Column - I | Column - II |
|---|---|
| (A) Carbonate | (p) Siderite |
| (B) Sulphide | (q) Malachite |
| (C) Hydroxide | (r) Bauxite |
| (D) Oxide | (s) Calamine |
| (t) Argentite |
(A) $$\to$$ p,q,s; (B) $$\to$$ t; (C) $$\to$$ q,r; (D) $$\to$$ r
(A) $$\to$$ s; (B) $$\to$$ s,t; (C) $$\to$$ r; (D) $$\to$$ r,s
(A) $$\to$$ p,s; (B) $$\to$$ s,t; (C) $$\to$$ r; (D) $$\to$$ s
(A) $$\to$$ p,q,s; (B) $$\to$$ s,t; (C) $$\to$$ p,r; (D) $$\to$$ t
Explanation
Carbonate ores are
(P) Siderite : FeCO3
(Q) Malachite : CuCO3.Cu(OH)2
(S) Calamine : ZnCO3
Sulphide ore is (T) Argentite : Ag2S.
Hydroxide ion is present in
(Q) Malachite : CuCO3.Cu(OH)2
(R) Bauxite : Al2O3.2H2O or AlOx
(OH)3–2x
where 0 < x < 1
Oxide ore is bauxite (R) only
Note : ( Remember all those ores names. Any one of those can be asked in the exam.)
Oxides Ores :
(1) ZnO - Zincite
(2) Fe2O3 - Haematite
(3) Fe3O4 - Magnetite (FeO + Fe2O3 mixture)
(4) Fe2O3 . 3H2O - Limonite
(5) MnO2 - Pyrolusite
(6) Cu2O - Cuprite or Ruby Copper
(7) TiO2 - Rutile
(8) FeCr2O4 - Chromite (FeO + Cr2O3)
(9) FeTiO3 - Illmenite (FeO + TiO2)
(10) Na2B4O7 . 10H2O - Borax or Tincal
(11) U3O8 - Pitch Blende
(12) SnO2 - Tin Stone or Cassiterite
(13) Ca2B6O11 . 5H2O - Colemanite (2 Cao + 3 B2O3)
(14) Al2O3 . 2H2O - Bauxite
(15) Al2O3 . H2O - Diaspore
(16) Al2O3 - Corundum
Sulphides Ores :
(1) ZnS - Zinc Blende or Sphalerite
(2) PbS - Galena
(3) Ag2S - Argentite or Silver Glance
(4) HgS - Cinnabar
(5) Cu2S - Chalcocite or Copper glance
(6) CuFeS2 - Copper pyrites or Chalco pyrites (Cu2S + Fe2S3 mixture)
(7) FeS2 - Iron pyrites or Fool's Gold
(8) 3Ag2S . Sb2S2 - Pyrargyrite or ruby silver
Halides Ores :
(1) NaCl - Rock Salt
(2) KCl - Sylvine
(3) Na3AlF6 - Cryolite [3NaF + AlF6]
(4) CaF2 - Fluorspar
(5) KCl . MgCl2 . 6H2O - Carnalite
(6) AgCl - Horn Silver
Carbonates Ores :
(1) CaCO3 - Limestone
(2) MgCO3 - Magnesite
(3) CaCO3 . MgCO3 - Dolomite
(4) ZnCO3 - Calamine
(5) PbCO3 - Cerrusite
(6) FeCO3 - Siderite
(7) CuCO3 . Cu(OH)2 or Cu2CO3(OH)2 - Malachite or Basic Copper Carbonates
(8) 2 CuCO3 . Cu(OH)2 - Azurite
Sulphates Ores :
(1) CuSO4 . 2H2O - Gypsum
(2) MgSO4 . 7H2O - Epson Salt
(3) Na2SO4 . 10 H2O - Glauber's Salt
(4) PbSO4 - Anglesite
(5) ZnSO4 . 7H2O - White Vitriol
(6) FeSO4 . 7H2O - Green Vitriol
(7) CuSO4 . 5H2O - Blue Vitriol or Chalcanthite
Nitrate Ores :
(1) KNO3 - Indian Saltpetre
(2) NaNO3 - Chile Saltpetre
Arsenides Ores :
(1) NiAs - Kupfernickel
(2) NiAsS - Nickel glance
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