List of top Chemistry Questions on Concentration of ores

Given below are two statements:
Statement I : In froth floatation method a rotating paddle agitates the mixture to drive air out of it.
Statement II : Iron pyrites are generally avoided for extraction of iron due to environmental reasons.
In the light of the above statements, choose the correct answer from the options given below:

Ferric oxide in blast furnace's upper half is mainly reduced by:

Extraction of which one of the following metals involves concentration of the ore by leaching?

The methods NOT involved in concentration of ore are
A Liquation
B Leaching
C Electrolysis
D Hydraulic washing
E Froth floatation
Choose the correct answer from the options given below :

Match List-I with List-II.

List-I		List-II
(A)	Aluminium	(I)	Calamine
(B)	Iron	(II)	Bauxite
(C)	Copper	(III)	Malachite
(D)	Zinc	(IV)	Siderite

Choose the correct answer from the options given below:

Ore of copper is:

Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex [A], which on reaction with zinc forms the elemental gold and another complex [B]. [A] and [B], respectively are :

Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, the number of principal ores of iron is____.

The carbonate ore among the following is

Which of the following is not a sulphide ore?

Which one of the following is an ore of aluminium?

Identify the correct statement from the following :

The most suitable method for concentration of sulphide ore is

The idea of froth floatation method came from a person $X$ and this method is related to the process $Y$ of ores. $X$ and $Y$, respectively, are:

The correct statement regarding the given Ellingham diagram is:

The ore that contains both iron and copper is:

Identify the metal which is not common to German Silver and Brass.

Which of the following are carbonate ores? l) Magnetite II) Kaolinite III) Siderite IV) Calamine

Cassetrite is Ore of :

In the extraction of Cu, the metal is formed in the bessemer converter due to the reaction:

Heating a mixture of $ {Cu_2O}$ and $ {Cu_2S}$ will give

Oil used as frothing agent in froth floatation process is

The complex formed when $Al_2O_3$ is leached from Bauxite using concentrated NaOH solution is,

The magnetite ore is