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The method/process used for the concentration of haematite ore is:

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Important Questions on Transition and Inner Transition Elements

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

Which of the following ore is concentrated using group

1

cyanide salt?

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of 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>Transition and Inner Transition Elements>Extraction of 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

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

The role of

NaCN

in the separation of

PbS

and

ZnS

by froth floatation method is

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

The correct statement is:

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

Sulphide ores are generally concentrated by

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of 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

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

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

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

The correct statement is:

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

Calamine, malachite, magnetite and cryolite, respectively are:

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

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

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

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

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

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

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of 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>Transition and Inner Transition Elements>Extraction of Metals

Extraction of gold and silver involves leaching the metal with

{CN}^{-}

ion. The metal is later recovered by _____.

HARD

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

The stabilizer used for stabilizing froth is

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

Which method is not used for concentration of ores?

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

The ore which is concentrated by leaching

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of 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:

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Extraction of Metals

Extraction of gold and silver involves leaching with

C N^{-}

ion. Silver or gold is later recovered by:

The method/process used for the concentration of haematite ore is:

Important Questions on Transition and Inner Transition Elements

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