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JEE Advanced > General Principles and Processes of Isolation of Elements

Explore popular questions from General Principles and Processes of Isolation of Elements for JEE Advanced. This collection covers General Principles and Processes of Isolation of Elements previous year JEE Advanced questions hand picked by experienced teachers.

Q 1.

Correct4

Incorrect-1

Copper can be extracted from

A

Kupfernical

B

Dolomite

Malachite

D

Galena

Explanation

Q 2.

Correct4

Incorrect-1

In the alumino-thermite process, aluminium acts as

A

an oxidizing agent

B

a flux

a reducing agent

D

a solder

Explanation

Q 3.

Correct4

Incorrect-1

The chemical composition of 'slag' formed during the smelting process in the extraction of copper is

A

{tex} \mathrm { Cu } _ { 2 } \mathrm { O } + \mathrm { FeS } {/tex}

{tex} \mathrm { FeSiO } _ { 3 } {/tex}

C

{tex} \mathrm {CuFeS_{ 2 }} {/tex}

D

{tex} \mathrm { Cu } _ { 2 } \mathrm { S } + \mathrm { FeO } {/tex}

Explanation

Q 4.

Correct4

Incorrect-1

Which of the following process is used in the extractive metallurgy of magnesium?

fused salt electrolysis

B

self reduction

C

aqueous solution electrolysis

D

thermite reduction

Explanation

Q 5.

Correct4

Incorrect-1

Which ore contains both iron and copper?

A

Cuprite

B

Chalcocite

Chalcopyrite

D

Malachite

Explanation

Q 6.

Correct4

Incorrect-1

Extraction of zinc from zinc blende is achieved by

A

electrolytic reduction

roasting followed by reduction with carbon

C

roasting followed by reduction with another metal

D

roasting followed by self-reduction

Explanation

Q 7.

Correct4

Incorrect-1

Oxidation states of the metal in the minerals haematite and magnetite, respectively, are

A

II, III in haematite and III in magnetite

B

II, III in haematite and II in magnetite

C

II in haematite and II, III in magnetite

III in haematite and II, III in magnetite

Explanation

Q 8.

Correct4

Incorrect-1

In the cyanide extraction process of silver from argentite ore, the oxidising and reducing agents used are

A

{tex} \mathrm { O } _ { 2 } {/tex} and {tex} \mathrm { CO } {/tex} respectively

{tex} \mathrm { O } _ { 2 } {/tex} and {tex} \mathrm { Zn } {/tex} dust respectively

C

{tex} \mathrm { HNO } _ { 3 } {/tex} and {tex} \mathrm { Zn } {/tex} dust respectively

D

{tex} \mathrm { HNO } _ { 3 } {/tex} and {tex} \mathrm { CO } {/tex} respectively

Explanation



Q 9.

Correct4

Incorrect-1

Sulfide ores are common for the metals

{tex} \mathrm { Ag } , \mathrm { Cu } {/tex} and {tex} \mathrm { Pb } {/tex}

B

{tex} \mathrm { Ag } , \mathrm { Mg } {/tex} and {tex} \mathrm { Pb } {/tex}

C

{tex} \mathrm { Ag } , \mathrm { Cu } {/tex} and {tex} \mathrm { Sn } {/tex}

D

{tex} \mathrm { Al } , \mathrm { Cu } {/tex} and {tex} \mathrm { Pb } {/tex}

Explanation

Q 10.

Correct4

Incorrect-1

Calamine, malachite, magnetite and cryolite, respectively, are

{tex} \mathrm { ZnCO } _ { 3 } , \mathrm { CuCO } _ { 3 } , \mathrm { Cu } ( \mathrm { OH } ) _ { 2 } , \mathrm { Fe } _ { 3 } \mathrm { O } _ { 4 } , \mathrm { Na } _ { 3 } \mathrm { AlF } _ { 6 } {/tex}

B

{tex} \mathrm { ZnSO } _ { 4 } , \mathrm { Cu } ( \mathrm { OH } ) _ { 2 } , \mathrm { Fe } _ { 3 } \mathrm { O } _ { 4 } , \mathrm { Na } _ { 3 } \mathrm { AlF } _ { 6 } {/tex}

C

{tex} \mathrm { ZnSO } _ { 4 } , \mathrm { CuCO } _ { 3 } , \mathrm { Fe } _ { 2 } \mathrm { O } _ { 3 } , \mathrm { AlF } _ { 3 } {/tex}

D

{tex} \mathrm { ZnCO } _ { 3 }, \mathrm { CuCO } _ { 3 } , \mathrm { Fe } _ { 2 } \mathrm { O } _ { 3 } , \mathrm { Na } _ { 3 } \mathrm { AlF } _ { 6 } {/tex}

Explanation

Q 11.

Correct4

Incorrect-1

Copper can be extracted from

A

Kupfernickel

B

Dolomite

C

Cinnabar

Malachite

Q 12.

Correct4

Incorrect-1

In the manufacture of iron from haematite, the function of lime stone is as

A

a reducing agent

B

slag

flux

D

gangue

Q 13.

Correct4

Incorrect-1

Calcium is obtained by

Electrolysis of molten {tex} \mathrm { CaCl } _ { 2 } {/tex}

B

Electrolysis of aqueous solution of {tex} \mathrm { CaCl } _ { 2 } {/tex}

C

Reduction of {tex} \mathrm { CaCl } _ { 2 } {/tex} with carbon

D

Roasting of lime stone

Q 14.

Correct4

Incorrect-1

The major role of fluorspar ({tex}\mathrm {CaF_2} {/tex}) which in small quantities in the clectrolytic reduction of alumina dissolved in fused crolite {tex} \left( \mathrm { Na } _ { 3 } \mathrm { AlF } _ { 6 } \right) {/tex} is

A

that of a catalyst

B

to make the fused mixture very conducting

to lower the temperature of the melt

D

to decrease the rate of oxidation of carbon at the anode

Q 15.

Correct4

Incorrect-1

The chemical composition of 'slag' formed during the smelting process in the extraction of copper is

A

{tex} \mathrm { Cu } _ { 2 } \mathrm { O } + \mathrm { FeS } {/tex}

{tex} \mathrm { FeSiO } _ { 3 } {/tex}

C

{tex}\mathrm {CuFeS_2} {/tex}

D

{tex} \mathrm { Cu } _ { 2 } \mathrm { S } + \mathrm { FeO } {/tex}