d and f Block Elements — Page 24 | JEE Chemistry

Q231

Among the reactions (a) - (d), the reaction(s) that does/do not occur in the blast furnace during the extraction of iron is/are : (a) CaO + SiO2

\to

CaSiO3 (b) 3Fe2O3 + CO

\to

2Fe3O4 + CO2 (c) FeO + SiO2

\to

FeSiO3 (d) FeO

\to

Fe +

{{1 \over 2}}

O2

A (a) and (d)

B (c) and (d)

C (a)

D (d)

Correct Answer

Option B

Solution

In blast furnace (metallugy of iron) involved reactions are (a) CaO + SiO2 $\to$ CaSiO3 (b) 3Fe2O3 + CO $\to$ 2Fe3O4 + CO2

Q232

Math with . (Metal) (Ores)

List - I		List - II
(a)	Aluminium	(i)	Siderite
(b)	Iron	(ii)	Calamine
(c)	Copper	(iii)	Kaolinite
(d)	Zinc	(iv)	Malachite

A (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

B (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

C (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

D (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

Correct Answer

Option C

Solution

Siderite $\to$ FeCO3 Calamine $\to$ ZnCO3 Kaolinite $\to$ Si2Al2O5(OH)4 or Al2O3.2SiO2.2H2O Malachite $\to$ CuCO3.

Cu(OH)2 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

Q233

Match with . (Ore) (Element Present)

List - I		List - II
(a)	Kernite	(i)	Tin
(b)	Cassiterite	(ii)	Boron
(c)	Calamine	(iii)	Fluorine
(d)	Cryolite	(iv)	Zinc Choose the most appropriate answer from the options given below :

A (a)

\to

(i), (b)

\to

(iii), (c)

\to

(iv), (d)

\to

(ii)

B (a)

\to

(iii), (b)

\to

(i), (c)

\to

(ii), (d)

\to

(iv)

C (a)

\to

(ii), (b)

\to

(i), (c)

\to

(iv), (d)

\to

(iii)

D (a)

\to

(ii), (b)

\to

(iv), (c)

\to

(i), (d)

\to

(iii)

Correct Answer

Option C

Solution

Kernite : Na2B4O7.4H2O (Boron) Cassiterite : SnO2 (Tin) Calamine : ZnCO3 (Zinc) Cryolite : Na3AlF6 (Fluorine) 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

Q234

Match with .

List - I		List - II
(a)	Siderite	(i)	Cu
(b)	Calamine	(ii)	Ca
(c)	Malachite	(iii)	Fe
(d)	Cryolite	(iv)	Al
()		(v)	Zn

A (a)

\to

(i), (b)

\to

(ii), (c)

\to

(iii), (d)

\to

(iv)

B (a)

\to

(iii), (b)

\to

(i), (c)

\to

(v), (d)

\to

(ii)

C (a)

\to

(i), (b)

\to

(ii), (c)

\to

(v), (d)

\to

(iii)

D (a)

\to

(iii), (b)

\to

(v), (c)

\to

(i), (d)

\to

(iv)

Correct Answer

Option D

Solution

Siderite $\to$ FeCO3 Calamine $\to$ ZnCO3 Malachite $\to$ CuCO3.

Cu(OH)2 Cryolite $\to$ Na3AlF6 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

Q235

Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?

A It is also known as Graham's salt.

B It is polymeric compound and is water soluble.

C It does not remove Ca2+ ion by precipitation.

D Calgon contains the 2nd most abundant element by weight in the Earth's crust.

Correct Answer

Option D

Solution

Calgon is sodium hexametaphosphate, a polymeric compound also called as Graham’s salt.

Order of abundance of element in earth crust is O > Si > Al > Fe > Ca > Na > Mg > K So second most abundant element in earth crust is Si not Ca.

Q236

The process that involves the removal of sulphur from the ores is :

A Roasting

B Smelting

C Leaching

D Refining

Correct Answer

Option A

Solution

Removal of sulphur from the ore is done by Roasting.

Q237

Which of the following reduction reaction CANNOT be carried out with coke?

A ZnO

\to

Zn

B Fe2O3

\to

Fe

C Cu2O

\to

Cu

D Al2O3

\to

Al

Correct Answer

Option D

Solution

Al2O3 is reduced by the electrolytic reduction method.

Q238

Match with :

List - I		List - II
(a)	Haematite	(i)	$A{l_2}{O_3}\,.\,x{H_2}O$
(b)	Bauxite	(ii)	$F{e_2}{O_3}$
(c)	Magnetite	(iii)	$CuC{O_3}\,.\,Cu{(OH)_2}$
(d)	Malachite	(iv)	$F{e_3}{O_4}$

A (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)

B (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

C (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)

D (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)

Correct Answer

Option B

Solution

(a) Haematite $\to$ (ii) Fe2O3 (b) Bauxite $\to$ (i) Al2O3.xH2O (c) Magnetite $\to$ (iv) Fe3O4 (d) Malachite $\to$ (iii) CuCO3.

Cu(OH)2

Q239

Match with :

List - I		List - II
(a)	Mercury	(i)	Vapour phase refining
(b)	Copper	(ii)	Distillation refining
(c)	Silicon	(iii)	Electrolytic refining
(d)	Nickel	(iv)	Zone refining Choose the most appropriate answer from the option given below :

A (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

B (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)

C (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)

D (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)

Correct Answer

Option A

Solution

(a) Mercury $\to$ Distillation refining (b) Copper $\to$ Electrolytic refining (c) Silicon $\to$ Zone refining (d) Nickel $\to$ Vapour phase refining

Q240

Match with : (Name of ore/mineral) (Chemical formula)

List - I		List - II
(a)	Calmine	(i)	$Zns$
(b)	Malachite	(ii)	$FeC{O_3}$
(c)	Siderite	(iii)	$ZnC{O_3}$
(d)	Sphalerite	(iv)	$CuC{O_3}.Cu{(OH)_2}$ Choose the most appropriate answer from the options given below :

A (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

B (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

C (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

D (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

Correct Answer

Option A

Solution

(Name of ore/mineral) (a) Calamine - ZnCO3 (b) Malachite - CuCO3 .

Cu(OH)2 (c) Siderite - FeCO3 (d) Sphalerite - ZnS 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