Metallurgical Operations Test 3

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Metal which can be extracted from all the three dolomite, magnesite and carnallite is

Answers Choices:

\(Na\)

\(K\)

\(Mg\)

\(Ca\)

Questions 2 of 50

Question:Cinnabar is an ore of

Answers Choices:

\(Hg\)

\(Cu\)

\(Pb\)

\(Zn\)

Questions 3 of 50

Question:Metallurgy is the process of

Answers Choices:

Concentrating the ore

Roasting the ore

Extracting the metal from the ore

Adding carbon to the ore in blast furnace

Questions 4 of 50

Question:What is believed to be the second most common element in the universe

Answers Choices:

Helium

Hydrogen

Nitrogen

Silicon

Questions 5 of 50

Question:Which is not a mineral of aluminium

Answers Choices:

Anhydrite

Bauxite

Corundum

Diaspore

Questions 6 of 50

Question:Which of the following mineral does not contain \(Al\)

Answers Choices:

Cryolite

Mica

Feldspar

Fluorspar

Questions 7 of 50

Question:An important oxide ore of iron is

Answers Choices:

Haematite

Siderite

Pyrites

Malachite

Questions 8 of 50

Question:Which ore is used for the manufacture of iron

Answers Choices:

Cryolite

Bauxite

Haematite

Chalcopyrites

Questions 9 of 50

Question:Which of the following statement is incorrect

Answers Choices:

Silver glance mainly contains silver sulphide

Gold is found in native state

Zinc blende mainly contain zinc chloride

Copper pyrites also contain \(F{e_2}{S_3}\)

Questions 10 of 50

Question:Commercially important ore of lead from which it is extracted is

Answers Choices:

Siderite

Haematite

Galena

None of these

Questions 11 of 50

Question:Which of the following is not an ore of lead

Answers Choices:

Galena

Anglesite

Calamine

Cerrusite

Questions 12 of 50

Question:Galena is

Answers Choices:

\(PbO\)

\(PbC{O_3}\)

\(PbS\)

\(PbC{l_2}\)

Questions 13 of 50

Question:Which ore contains both iron and copper?

Answers Choices:

Cuprite

Chalcocite

Chalcopyrite

Malachite

Questions 14 of 50

Question:Formula of Felspar is

Answers Choices:

\({K_2}O.A{l_2}{O_3}.6Si{O_2}\)

\({K_2}{O_3}.A{l_2}{O_3}.6S{i_2}.{O_2}.2{H_2}O\)

\(A{l_2}{O_3}.2Si{O_2}.2{H_2}O\)

\(3MgO.4Si{O_2}.{H_2}O\)

Questions 15 of 50

Question:Chile saltpetre is

Answers Choices:

\(NaN{O_3}\)

\(KN{O_3}\)

\(N{a_2}S{O_4}\)

\(N{a_2}{S_2}{O_3}\)

Questions 16 of 50

Question:Which of the following is not an ore of magnesium

Answers Choices:

Magnesite

Dolomite

Gypsum

Carnalite

Questions 17 of 50

Question:The substance added in water in the froth floatation process is

Answers Choices:

Soap powder

Pine oil

Coconut oil

None of the above

Questions 18 of 50

Question:For which ore of the metal, froth floatation method is used for concentration

Answers Choices:

Horn silver

Bauxite

Cinnabar

Haematite

Questions 19 of 50

Question:Cyanide process is used in the extraction of

Answers Choices:

\(Au\)

Ag

both (1) and (2)

Cu

Questions 20 of 50

Question:Cassiterite is concentrated by

Answers Choices:

Levigation

Electromagnetic separation

Floatation

Liquifaction

Questions 21 of 50

Question:The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

Answers Choices:

Levigation

Leaching

Magnetic separation

Liquifaction

Questions 22 of 50

Question:Which of the following ore is best concentrated by froth-flotation method

Answers Choices:

Galena

Cassiterite

Magnetite

Malachite

Questions 23 of 50

Question:Refractory materials are generally used in furnaces because

Answers Choices:

They possess great structural strength

They can withstand high temperature

They are chemically inert

They do not require replacement

Questions 24 of 50

Question:Main function of roasting is

Answers Choices:

To remove volatile substances

Oxidation

Reduction

Slag formation

Questions 25 of 50

Question:Which of the following substance can be used for drying gases

Answers Choices:

\(CaC{O_3}\)

\(N{a_2}C{O_3}\)

\(NaHC{O_3}\)

\(CaO\)

Questions 26 of 50

Question:Which one of the furnaces among the following can produce the highest temperature

Answers Choices:

Muffle furnace

Blast furnace

Reverberatory furnace

Electric furnace

Questions 27 of 50

Question:The process of heating the ore strongly in excess of air so that the volatile impurities are removed and the ore is changed to oxide is known as

Answers Choices:

Calcination

Roasting

Froth floatation

Leaching

Questions 28 of 50

Question:The role of calcination in metallurgical operations is

Answers Choices:

To remove moisture

To decompose carbonate

To drive off organic matter

To achieve all the above

Questions 29 of 50

Question:Which of the following metal is extracted by amalgamation process

Answers Choices:

Tin

Silver

Copper

Zinc

Questions 30 of 50

Question:The reaction \(2ZnS + 3{O_2} \to 2ZnO + 2S{O_2}\) in the metallurgical process of zinc is called

Answers Choices:

Calcination

Cupellation

Smelting

Roasting

Questions 31 of 50

Question:Calcination is used in metallurgy for removal of

Answers Choices:

Water and sulphide

Water and \(C{O_2}\)

\(C{O_2}\) and \({H_2}S\)

\({H_2}O\) and \({H_2}S\)

Questions 32 of 50

Question:Which of the following is slag

Answers Choices:

\(CaO\)

\(CaS{O_4}\)

\(CaSi{O_3}\)

\(Si{O_2}\)

Questions 33 of 50

Question:The final step for the extraction of copper from copper pyrite in Bessemere converter involves the reaction

Answers Choices:

\(4C{u_2}O + FeS \to 8Cu + FeS{O_4}\)

\(C{u_2}S + 2C{u_2}O \to 6Cu + S{O_2}\)

\(2C{u_2}O + FeS \to 4Cu + Fe + S{O_2}\)

\(C{u_2}S + 2FeO \to 2Cu + 2FeCO +S{O_2}\)

Questions 34 of 50

Question:Flux is used to remove

Answers Choices:

Silica

Metal oxide

All impurities from ores

Silica and undesirable metal oxide

Questions 35 of 50

Question:Roasting is done in

Answers Choices:

Blast furnace

Open hearth furnace

Electric furnace

None of these

Questions 36 of 50

Question:Which of the following fluxes is used to remove acidic impurities in metallurgical process

Answers Choices:

Silica

Lime stone

Sodium chloride

Sodium carbonate

Questions 37 of 50

Question:Function of the flux added during smelting is

Answers Choices:

To make ore porous

To remove gangue

To make reduction easier

To precipitate slag

Questions 38 of 50

Question:Alumino–thermic process is used for the extraction of metals, whose oxides are

Answers Choices:

Fusible

Not easily reduced by carbon

Not easily reduced by hydrogen

Strongly basic

Questions 39 of 50

Question:In blast furnace iron oxide is reduced by

Answers Choices:

Silica

\(CO\)

Carbon

Lime stone

Questions 40 of 50

Question:Furnaces are lined with calcium oxide because

Answers Choices:

It gives off oxygen on heating

It gives strong light on heating

It is refractory and basic

It is not affected by acids

Questions 41 of 50

Question:Which one of the following is used in the extraction of aluminium by electrolytic process

Answers Choices:

\(A{l_2}{O_3}\)

\(Al{(OH)_3}\)

\(AlC{l_3}\)

\(A{l_2}{(S{O_4})_3}\)

Questions 42 of 50

Question:Which technique is used in the manufacture of aluminium from bauxite

Answers Choices:

Reduction with magnesium

Reduction with coke

Electrolytic reduction

Reduction with iron

Questions 43 of 50

Question:Which of the following processes does not involve a catalyst

Answers Choices:

Haber's process

Thermite process

Ostwald process

Contact process

Questions 44 of 50

Question:Thermite process is used to extract metals

Answers Choices:

When their oxides can't be reduced by carbon

When their carbonates do not yield oxides by thermal decomposition

When their sulphides can't be converted into oxides by roasting

When their melting points are very high

Questions 45 of 50

Question:Heating with carbon in absence of air is known as

Answers Choices:

Reduction

Carbon-reduction

Smelting

Roasting

Questions 46 of 50

Question:In electrolytic refining of metals, electrolysis of an aqueous solution of its complex salt is done with impure metal as anode and an strip of pure metal as cathode. This method cannot be used for the refining of the metal

Answers Choices:

Silver

Copper

Aluminium

Zinc

Questions 47 of 50

Question:Which method of purification is represented by the equation \(\mathop {Ti + 2{I_2}}\limits_{{\rm{Impure}}} Ti{I_4}\mathop {Ti + 2{I_2}}\limits_{{\rm{Pure}}} \)

Answers Choices:

Cupellation

Poling

Van Arkel

Zone refining

Questions 48 of 50

Question:Cupellation process is used in the metallugry of

Answers Choices:

Copper

Silver

Aluminium

Iron

Questions 49 of 50

Question:Mond's process is used for preparing

Answers Choices:

\(Ni\)

\({H_2}S{O_4}\)

\(N{H_3}\)

\(HN{O_3}\)

\(NaHC{O_3}\)

Questions 50 of 50

Question:Gold is extracted by hydrometallurgical process based on its property

Answers Choices:

Of being electropositive

Of being less reactive

To form complexes which are water soluble

To form salts which are water soluble