# 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

$$Na$$

$$K$$

$$Mg$$

$$Ca$$

## Questions 2 of 50

Question:Cinnabar is an ore of

$$Hg$$

$$Cu$$

$$Pb$$

$$Zn$$

## Questions 3 of 50

Question:Metallurgy is the process of

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

Helium

Hydrogen

Nitrogen

Silicon

## Questions 5 of 50

Question:Which is not a mineral of aluminium

Anhydrite

Bauxite

Corundum

Diaspore

## Questions 6 of 50

Question:Which of the following mineral does not contain $$Al$$

Cryolite

Mica

Feldspar

Fluorspar

## Questions 7 of 50

Question:An important oxide ore of iron is

Haematite

Siderite

Pyrites

Malachite

## Questions 8 of 50

Question:Which ore is used for the manufacture of iron

Cryolite

Bauxite

Haematite

Chalcopyrites

## Questions 9 of 50

Question:Which of the following statement is incorrect

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

Siderite

Haematite

Galena

None of these

## Questions 11 of 50

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

Galena

Anglesite

Calamine

Cerrusite

## Questions 12 of 50

Question:Galena is

$$PbO$$

$$PbC{O_3}$$

$$PbS$$

$$PbC{l_2}$$

## Questions 13 of 50

Question:Which ore contains both iron and copper?

Cuprite

Chalcocite

Chalcopyrite

Malachite

## Questions 14 of 50

Question:Formula of Felspar is

$${K_2}O.A{l_2}{O_3}.6Si{O_2}$$

$${K_2}{O_3}.A{l_2}{O_3}.6S{i_2}.{O_2}.2{H_2}O$$

$$A{l_2}{O_3}.2Si{O_2}.2{H_2}O$$

$$3MgO.4Si{O_2}.{H_2}O$$

## Questions 15 of 50

Question:Chile saltpetre is

$$NaN{O_3}$$

$$KN{O_3}$$

$$N{a_2}S{O_4}$$

$$N{a_2}{S_2}{O_3}$$

## Questions 16 of 50

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

Magnesite

Dolomite

Gypsum

Carnalite

## Questions 17 of 50

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

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

Horn silver

Bauxite

Cinnabar

Haematite

## Questions 19 of 50

Question:Cyanide process is used in the extraction of

$$Au$$

Ag

both (1) and (2)

Cu

## Questions 20 of 50

Question:Cassiterite is concentrated by

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

Levigation

Leaching

Magnetic separation

Liquifaction

## Questions 22 of 50

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

Galena

Cassiterite

Magnetite

Malachite

## Questions 23 of 50

Question:Refractory materials are generally used in furnaces because

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

To remove volatile substances

Oxidation

Reduction

Slag formation

## Questions 25 of 50

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

$$CaC{O_3}$$

$$N{a_2}C{O_3}$$

$$NaHC{O_3}$$

$$CaO$$

## Questions 26 of 50

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

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

Calcination

Roasting

Froth floatation

Leaching

## Questions 28 of 50

Question:The role of calcination in metallurgical operations is

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

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

Calcination

Cupellation

Smelting

Roasting

## Questions 31 of 50

Question:Calcination is used in metallurgy for removal of

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

$$CaO$$

$$CaS{O_4}$$

$$CaSi{O_3}$$

$$Si{O_2}$$

## Questions 33 of 50

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

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

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

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

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

## Questions 34 of 50

Question:Flux is used to remove

Silica

Metal oxide

All impurities from ores

Silica and undesirable metal oxide

## Questions 35 of 50

Question:Roasting is done in

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

Silica

Lime stone

Sodium chloride

Sodium carbonate

## Questions 37 of 50

Question:Function of the flux added during smelting is

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

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

Silica

$$CO$$

Carbon

Lime stone

## Questions 40 of 50

Question:Furnaces are lined with calcium oxide because

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

$$A{l_2}{O_3}$$

$$Al{(OH)_3}$$

$$AlC{l_3}$$

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

## Questions 42 of 50

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

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

Haber's process

Thermite process

Ostwald process

Contact process

## Questions 44 of 50

Question:Thermite process is used to extract metals

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

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

Silver

Copper

Aluminium

Zinc

## Questions 47 of 50

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

Cupellation

Poling

Van Arkel

Zone refining

## Questions 48 of 50

Question:Cupellation process is used in the metallugry of

Copper

Silver

Aluminium

Iron

## Questions 49 of 50

Question:Mond's process is used for preparing

$$Ni$$

$${H_2}S{O_4}$$

$$N{H_3}$$

$$HN{O_3}$$

$$NaHC{O_3}$$

## Questions 50 of 50

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