Explore topic-wise MCQs in General Principles and Processes of Isolation of Elements.

This section includes 29 Mcqs, each offering curated multiple-choice questions to sharpen your General Principles and Processes of Isolation of Elements knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following metals is not extracted by leaching?

A. Aluminium
B. Mercury
C. Silver
D. Gold
Answer» C. Silver
Discussion
2.

Sulphide ore of zinc/copper is concentrated by

A. floatation process
B. electromagnetic process
C. gravity separation
D. distillation
Answer» B. electromagnetic process
Discussion
3.

The oil used as frothing agent in froth floatation process is

A. coconut oil
B. castor oil
C. palmitic oil
D. pine oil
Answer» E.
Discussion
4.

Which of the following metals cannot be obtained by reduction of its metal oxide bv aluminium ?

A. Cr
B. Mn
C. Fe
D. Mg
Answer» E.
Discussion
5.

Which of the following sulphides when heated strongly in air gives the corresponding metal without undergoing separate reduction of oxide?

A. Cu2S
B. FeS
C. HgS
D. ZnS
Answer» D. ZnS
Discussion
6.

Which of the following metals is extracted using a silica lined convertor?

A. Mg
B. Al
C. Cu
D. Zn
Answer» D. Zn
Discussion
7.

The significance of leaching in the extraction of aluminium is

A. it helps removing the impurities like SiO2, Fe2O3 etc. from the bauxite ore
B. it converts the ore into oxide
C. it reduces melting point of the ore
D. it eliminates water from bauxite
Answer» B. it converts the ore into oxide
Discussion
8.

Which of the following ores cannot be concentrated by magnetic separation?

A. Haematite
B. Malachite
C. Magnetite
D. Siderite
Answer» C. Magnetite
Discussion
9.

Common impurities present in bauxite are

A. CuO
B. ZnO
C. CaO
D. SiO2
Answer» E.
Discussion
10.

An ore of tin containing FeCrO4 is concentrated by

A. gravity separation
B. magnetic separation
C. froth floatation
D. leaching
Answer» C. froth floatation
Discussion
11.

How do we separate two sulphide ores by froth floatation method?

A. By using excess of pine oil
B. By adjusting proportion of oil to water or using depressant.
C. By using some solvent in which one of the sulphides is soluble
D. By using collectors and froth stabilisers like xanthates
Answer» C. By using some solvent in which one of the sulphides is soluble
Discussion
12.

Which of the following ores is concentrated by chemical leaching method?

A. Cinnabar
B. Argentite
C. Copper pyrites
D. Galena
Answer» C. Copper pyrites
Discussion
13.

The powdered ore is agitated with water or washed with running stream of water. The heavy ore particles and lighter impurities are separated. This method of concentration is known as

A. metallurgy
B. leaching
C. froth floatation process
D. gravity separation
Answer» E.
Discussion
14.

For which of the following ores froth floatation method is used for concentration?

A. Haematite
B. Zinc blende
C. Magnetite
D. Camallite
Answer» C. Magnetite
Discussion
15.

Removal of the unwanted materials like sand, clays, etc. from the ore is known as ., .. or .

A. concentration, dressing, benefaction
B. separation, refining, gangue
C. magnetic separation, purification, gangue
D. washing, refining, amalgamation
Answer» B. separation, refining, gangue
Discussion
16.

Ore of aluminium is

A. bauxite
B. hematite
C. dolomite
D. None of these
Answer» B. hematite
Discussion
17.

Concentration of sulphide ore is done by

A. froth flotation process
B. electrolysis
C. roasting
D. None of these
Answer» B. electrolysis
Discussion
18.

Malachite is an ore of

A. iron
B. copper
C. zinc
D. Sliver
Answer» C. zinc
Discussion
19.

Heating pyrites to remove sulphur is called

A. smelting
B. calcination
C. liquation
D. roasting
Answer» E.
Discussion
20.

Which of the following oxides cannot be reduced by hydrogen?

A. Ferric oxide
B. Aluminium oxide
C. Zinc oxide
D. Cupric oxide
Answer» C. Zinc oxide
Discussion
21.

Which of the following slags is produced during extraction of iron?

A. CaSiO3
B. FeSiO3
C. MgSiO3
D. ZnSiO3
Answer» B. FeSiO3
Discussion
22.

Blister copper is

A. impure copper
B. obtained in self reduction process during bessermerisation
C. Both are correct
D. None is correct
Answer» D. None is correct
Discussion
23.

In a thermite process is used as reducing agent.

A. Zn
B. Al
C. Mn
D. Fe
Answer» C. Mn
Discussion
24.

From the Ellingham graph between Gibb s energy and temperature, out of C and CO with is a better reducing agent for ZnO?

A. Carbon
B. CO
C. Both of these
D. None of these
Answer» B. CO
Discussion
25.

During the extraction of haematite, limestone is added which acts as

A. flux
B. slag
C. reducing agent
D. gangue
Answer» B. slag
Discussion
26.

In blast furnace iron oxide is reduced by

A. silica
B. carbon monoxide
C. carbon
D. lime stone
Answer» C. carbon
Discussion
27.

In metallurgical process, aluminium acts as

A. an oxidising agent
B. a reducing agent
C. acidic flux
D. basic flux
Answer» C. acidic flux
Discussion
28.

Ellingham diagram represents change of

A. G with temperature
B. H with temperature
C. G with pressure
D. ( G T S) with temperature
Answer» B. H with temperature
Discussion
29.

Impurities of sulphur, silicon and phosphorus can be removed from cast iron by adding

A. carbon which reduces the impurities
B. water which dissolves the impurities
C. limestone which changes impurities into oxides and pass into slag
D. iron oxide which reacts with impurities by forming slag
Answer» D. iron oxide which reacts with impurities by forming slag
Discussion