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The pyrometallurgical process used for the reduction of highly electropositive metals (such as Ag, Au) is known as cyanide process. Why this process is chosen instead of carbon reduction method ?
P. Because this method is economically favourable
Q. Because carbon reduction method require high temperature
R. Because this process involves displacement reaction
S. Because this is done by using electrolysis
Choose the correct pair of statement (s) which explain the exact answer of the above question.

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

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Match items of column-I with the items of column-II and assign the correct code:

	Column I		Column II
$(a)$	Cyanide process	$(i)$	Ultrapure $Ge$
$(b)$	Froth floatation process	$(ii)$	Dressing of $ZnS$
$(c)$	Electrolytic reduction	$(iii)$	Extraction of $Al$
$(d)$	Zone refining	$(iv)$	Extraction of $Au$
		$(v)$	Purification of $Ni$

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Bauxite, an ore of aluminium, is purified by which process?

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

${Al}_{2} O_{3}$ was leached with alkali to get $X .$ The solution of $X$ on passing of gas $Y,$ forms $Z .$

$X, Y$ and $Z$ respectively are

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Sulphide ores are generally concentrated by

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

The correct statement is:

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with

NaOH

is :

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Sodium Cyanide is added as a depressant in the froth flotation process when the ore contains a mixture of

ZnS

and

PbS .

This is because

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Which of the following statement is correct about the role of substances added in the froth flotation process?

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

The idea of froth flotation method came from a person

X

and this method is related to the process

Y

of ores.

X a n d Y,

respectivity, are:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Calamine, malachite, magnetite and cryolite, respectively are:

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

The role of

NaCN

in the separation of

PbS

and

ZnS

by froth floatation method is

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Which one of the following ores is best concentrated by froth flotation method?

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

The process of extracting a soluble material from an insoluble solid by dissolving out in a suitable solvent is known as:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Which of the following ore is concentrated using group

1

cyanide salt?

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Extraction of gold and silver involves leaching the metal with

{CN}^{-}

ion. The metal is later recovered by _____.

HARD

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

In the metallurgical extraction of gold, the method used for the concentration of ore is

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Which method is not used for concentration of ores?

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

The ore which is concentrated by leaching

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

The correct statement is:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Concentration of Ores

Extraction of gold and silver involves leaching with

C N^{-}

ion. Silver or gold is later recovered by:

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

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