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IMPORTANT

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In the froth flotation process, zinc sulphide and lead sulphide can be separated by:

(i) Using collectors

(ii) Adjusting the proportion of oil to water

(iii) Using froth stabilisers

(iv) Using depressants

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

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 3>Q 4

Choose the set of correct statements among the following.

$a .$ Ellingham diagram is a plot between $Δ_{f} G °$ per mole of oxide formed versus temperature.

$b .$ $E_{line}$ $C \to CO$ slope downwards; so, $C$ is used as a reducing agent for all the metal oxides.

$c .$ Slag is easily fusible material that melts at the temperature of the furnace, soluble in the molten metal.

$d .$ Hydrometallurgy involves the precipitation of ${Cu}^{2 +}$ ions from the solution in the presence of scrap.

$e .$ Liquation is used when the melting point of the metal is lower than the impurities.

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Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 3>Q 5

NaCl

and

{CaCl}_{2}

are added to fused

{MgCl}_{2}

in the electrolysis of

{MgCl}_{2}

since:

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Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 3>Q 6

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.

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Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 3>Q 7

The composition of matte is:

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JEE Main

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Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 3>Q 8

What is the atomic number of the common element present in the following ore - Bauxite, haematite, dolomite, zincite

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Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 3>Q 9

Two important ores of metals are given below
Malachite

C u C O_{3} . C u (O H)_{2} . x H_{2} O

Carnallite

K C l . M g C l_{2} . y H_{2} O

What is the value of

y ‐ x ?

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JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 3>Q 10

Among the following metals the number of metals that are extracted by self-reduction method from their respective ores is
Hg, Zn, Cu, Al, Mg, Pb, Fe, Na.

In the froth flotation process, zinc sulphide and lead sulphide can be separated by: (i) Using collectors (ii) Adjusting the proportion of oil to water (iii) Using froth stabilisers (iv) Using depressants

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

Learn and Prepare for any exam you want !

In the froth flotation process, zinc sulphide and lead sulphide can be separated by:

(i) Using collectors

(ii) Adjusting the proportion of oil to water

(iii) Using froth stabilisers

(iv) Using depressants