Hall Heroult's process is given by:

2 A l 2 O 3 + 3 C → 4 A l + 3 C O 2

C r 2 O 3 + 2 A l → A l 2 O 3 + C r

C u 2 + ( a q ) + H 2 ( g ) → C u ( s ) + 2 H + ( a q )

Z n O + C → C o k e , 1673 Z n + C O

EASY

JEE Main/Advance

IMPORTANT

Earn 100

The extraction of zinc from zinc blende involves:

50% studentsanswered this correctly

Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 31

Carbon cannot be used in the reduction of

{Al}_{2} O_{3}

because:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 32

Which of the following metal is extracted by the thermal reduction process?

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 35

High purity germanium is obtained by a technique that is based on:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 38

4. VanArkel method of purification of metals involves converting the metal to a

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 39

Out of the following metal extraction processes, those in which carbon based reduction methods are not used are:
(1)

Sn

from

{SnO}_{2}

(II)

Fe

from

{Fe}_{2} O_{3}

(III)

Al

from

{Al}_{2} O_{3}

(iv)

Mg

from

{MgCO}_{3} . {CaCO}_{3}

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 40

Aluminium and copper are extracted from their oxide and sulphide ores respectively. Which of the following is correct?
I. Copper is extracted by the auto reduction of copper oxide by copper sulphide
II. Aluminium cannot be obtained by chemical reduction due to its strong affinity for oxygen
III. In electrometallurgy of

Al

, graphite is used as cathode to avoid reoxidation of

Al

into

{Al}_{2} O_{3}

by preventing formation of

O_{2}

IV. Sulphide ores of copper are difficult to be reduced than the oxide ores

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 41

Give the correct order of initials

T

F

for the following statements. Use

T

if statement is true and

F

if it is false.

(i)

In the Gold Schmidt, thermite process aluminium acts as a reducing agent.

(ii)

Mg

is extracted by electrolysis of an aqueous solution of

{MgCl}_{2}

(iii)

Extraction of

Pb

is possible by carbon reduction of

PbO

in smelting.

(iv)

Red bauxite is purified by Serpeck's process.

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 42

Leaching of

A g_{2} S

is carried out by heating it with dilute solution of

The extraction of zinc from zinc blende involves:

Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)

Learn and Prepare for any exam you want !