1

JEE Advanced 2019 Paper 1 Offline

MCQ (Single Correct Answer)
Calamine, malachite, magnetic and cryolite, respectively, are
A
ZnCO3, CuCO3, Fe2O3, Na3AlF6
B
ZnSO4, CuCO3, Fe2O3, AlF3
C
ZnSO4, Cu(OH)2, Fe3O4, Na3AlF6
D
ZnCO3, CuCO3.Cu(OH)2, Fe3O4, Na3AlF6

Explanation

ZnCO3 - Calamine (zinc ore)

CuCO3.Cu(OH)2 - Malachite (copper ore)

Fe3O4 - Magnetite (iron ore)

Na3AlF6 - Cryolite (aluminum ore)

Thus, option (d) is correct.

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
2

JEE Advanced 2015 Paper 1 Offline

MCQ (Single Correct Answer)
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
(A) $$\to$$ p,q,s; (B) $$\to$$ t; (C) $$\to$$ q,r; (D) $$\to$$ r
B
(A) $$\to$$ s; (B) $$\to$$ s,t; (C) $$\to$$ r; (D) $$\to$$ r,s
C
(A) $$\to$$ p,s; (B) $$\to$$ s,t; (C) $$\to$$ r; (D) $$\to$$ s
D
(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
3

JEE Advanced 2013 Paper 1 Offline

MCQ (Single Correct Answer)
Sulphide ores are common for the metals
A
Ag, Cu and Pb
B
Ag, Mg and Pb
C
Ag, Cu and Sn
D
Al, Cu and Pb
4

IIT-JEE 2012 Paper 2 Offline

MCQ (Single Correct Answer)
In the cyanide extraction process of silver from argentite ore, the oxidising and reducing agents used are
A
O2 and CO respectively
B
O2 and Zn dust respectively
C
HNO3 and Zn dust respectively
D
HNO3 and CO respectively

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