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

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

Calamine, malachite, magnetite and cryolite, respectively are:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

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:

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

The correct statement is:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

${Al}_{2} O_{3}$ 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)>Reduction of Metal Oxides to Metals

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

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

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

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

The correct statement is:

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

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)>Reduction of Metal Oxides to Metals

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 $Ni$

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

Extraction of gold and silver involves leaching with

C N^{-}

ion. Silver or gold is later recovered by:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

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)>Reduction of Metal Oxides to Metals

Which of the following metals cannot be obtained by auto-reduction of their compounds?

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

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)>Reduction of Metal Oxides to Metals

The ore which is concentrated by leaching

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

Sulphide ores are generally concentrated by

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

The pair that does not require calcination is

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

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

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

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

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

Identify the auto reduction reactions from the following:

$a)$ ${Fe}_{3} O_{4} + 4 CO ⟶ 3 Fe + 4 {CO}_{2}$

$b)$ ${Cu}_{2} O + \frac{1}{2} {Cu}_{2} S ⟶ 3 Cu + \frac{1}{2} {SO}_{2}$

$c)$ $PbS + 2 PbO ⟶ 3 Pb + {SO}_{2}$

$d)$ ${Cu}_{2} O + C ⟶ 2 Cu + CO$

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Elements (Metallurgy)>Reduction of Metal Oxides to Metals

In the extraction of copper from its sulphide ore, metal is finally obtained by the oxidation of cuprous sulphide with:

What type of burial practice was common in the Harappan Civilization?

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

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