444 + Interview Questions in METTALURGY IN GENERAL AWARENESS Page 1 InterviewSolution

1.	Consider the following statements and arrange in the order of true/false as given in the codes. `S_(1)`:Cuprite, Limonite and Zincite are oxide ares `S_(2)` Magnesite and carnallite are magnesium ores `S_(3)`: Chalcocyte and azurite are ores of copper `S_(4)` Feldspar an mica minerals contain aluminium.A. TTTTB. FTFFC. FFTTD. TTFT
Answer» Correct Answer - a

Discussion

2.	Which of the following statements is correct about the role of substances addedd in the froth floatation process?A. Collectors enhance the non-wettability of the mineral particlesB. Collectors enhance the wettaability of gangue particlesC. By using depressents in the process two sulphides ores can be sepreatedD. Froth stablisers decrease wettability of gangue.
Answer» Correct Answer - 1,3,18

Discussion

3.	In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by__________A. using collectorsB. adjusting the proportion of oil to waterC. using depressentD. using froth stablisers
Answer» Correct Answer - 2,3

Discussion

4.	Which of the following ores are concentrated by froth floatation?A. haematiteB. GalenaC. Copper pyritesD. Magnetite
Answer» Correct Answer - 2,3

Discussion

5.	the common impurities present in bauxite areA. CuOB. ZnOC. `Fe_(2)O_(3)`D. `SiO_(2)`
Answer» Correct Answer - 3,4

Discussion

6.	Bauxide ore is made up of `Al_(2)O_(3) + SiO_(2) + TiO_(2) + Fe_(2) O_(3)`. This ore is treated with conc. `NaOH` solution at `500 K` and `35` bar pressure for a few hours and filtered hot. In the filtrate, the species present areA. Na`NaAl(OH)_(4)` onlyB. `Na_(2)Ti(OH)_(6)`C. `NaAl(OH)_(4)` and `Na_(2)SiO_(3)` bothD. `Na_(2)SiO_(3)` Only
Answer» Correct Answer - 3

Discussion

7.	During the process of electrolyic refining of copper some metals present as impurity settle as anode mud. These areA. Sn and AgB. Pb and ZnC. Ag and AuD. Fe and Ni
Answer» Correct Answer - C

Discussion

8.	The chemical composition of salg formed during the smelting process in the extraction of copper is :A. `Cu_(2)O+FeS`B. `FeSiO_(3)`C. `CuFeS_(2)`D. `Cu_(2)S++FeO`
Answer» Correct Answer - B

Discussion

9.	Which of the following statement is incorrect about the extractive metallurgy of coper?A. Matte chiefly consists of cuprous sulphide and some ferrous sulphide.B. Most of the impurity of iron sulphide is removed as fusible slag during roasting.C. The copper pyrites is concentrated by froth floatiation process.D. The copper obtained from Bessomer converter is called as blister copper.
Answer» Correct Answer - B

Discussion

10.	The chemical composition of slag formed during the smelting process in the extraction of copper is :-A. `Cu_(2)O+FeS`B. `FeSiO_(3)`C. `CuFeS_(2)`D. `Cu_(2)S++FeO`
Answer» Correct Answer - B

Discussion

11.	Assertion: Wrough iron is prepared from cast iron by oxidising impurities in a reverberatory furnace lined with haematite. Reason: Haematite oxidises carbon to carbon monoxide.A. Statement -1 is true, Statement-2 are true and Statement-2 is the correct explanation of Statement -1B. Statement -1 is true, Statement-2 are true and Statement-2 is not a correct explanation of Statement -1C. Statement-1 is true but Statement -2 is falseD. Statement-1 is false but Statement -2 is true
Answer» Correct Answer - b

Discussion

12.	Consider the following statements and arrange in the order of true/false as given in the codes.`S_(1)`: In extraction of iron from haematite ore, the reduction reactions take place in the lower temperature range and in the higher temperature range, in the higher temperature range, in the blast furnance. `S_(2)`: Sphalerite is an carbonate ore of Zinc. `S_(3)`: The principal ore of aluminium, bauxite, usually contains silica, iron oxides and titanium oxide as impuirities. `S_(4)` Solidified copper obtained from silica lined converto (Bessemer converter) has blistered appearance due to the evolution of `SO_(2)`.A. TFTTB. FTFFC. FFTTD. TFFT
Answer» Correct Answer - a

Discussion

13.	The metal A is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form a colourless solid from which hydrogen is released on treatment with water the metal isA. AlB. CaC. CuD. Zn
Answer» Correct Answer - 2

Discussion

14.	Aluminium is obtained by the electrolysis of pure of `Al_(2)O_(3)` dissolved inA. AluminaB. BauxiteC. CryoliteD. Felspar
Answer» Correct Answer - C

Discussion

15.	The metal which cannot be obtained by electrolysis of aqueous solution of its salts isA. AgB. MgC. CuD. Al
Answer» Correct Answer - B::D

Discussion

16.	An ore of tin containing `FeCrO_(4)` is concentrated by _____.A. Mangetic SeparationB. Froth floatation processC. Electrotatic methodD. Gravity separation
Answer» Correct Answer - 1

Discussion

17.	Method used for the concentration of tin stone ore isA. Hand pickingB. Froth FloatationC. Magnetic SeparationD. Leaching
Answer» Correct Answer - C

Discussion

18.	The magnetic impurity present in cassiterite ore isA. SilicaB. WolframiteC. `SnO_(2)`D. Clay
Answer» Correct Answer - B

Discussion

19.	Which among the following is a acidic fluxA. `SiO_(2)`B. `MgCO_(3)`C. `CaO_(3)`D. `Fe_(2)O_(3)`
Answer» Correct Answer - 1

Discussion

20.	Roasting of copper ore is carried out in which of the following furnace?A. Reverberatory furnaceB. Blast furnaceC. Either reverberatory furnace or blast furnaceD. Neither 1 nor 2
Answer» Correct Answer - 1

Discussion

21.	Smelling is usually carried out inA. Open hearth furnaceB. Blast furnaceC. Electric furnaceD. Muffle furnace
Answer» Correct Answer - 2

Discussion

22.	Metals which can be extracted by smelting process are :A. ZnsB. AlC. PbD. Fe
Answer» Correct Answer - 2

Discussion

23.	Which of the following metal can not be extracted by smelting processA. ZnsB. AlC. PbD. Fe
Answer» Correct Answer - 2

Discussion

24.	Match the items of Column I with items of Column II and assign the correct A. `{:(,A,B,C,D),(,1,2,4,5):}`B. `{:(,A,B,C,D),(,4,3,1,2):}`C. `{:(,A,B,C,D),(,3,4,2,1):}`D. `{:(,A,B,C,D),(,5,4,3,2):}`
Answer» Correct Answer - `Ato4;Bto3;Cto1;Dto2`

Discussion

25.	Assertion: `Ag` and `Au` are extracted by leaching the ores with a dilute solution of `NaCN`. Reason: Impurities associated with these ores dissolve in `NaCN`.A. Statement -1 is true, Statement-2 are true and Statement-2 is the correct explanation of Statement -1B. Statement -1 is true, Statement-2 are true and Statement-2 is not a correct explanation of Statement -1C. Statement-1 is true but Statement -2 is falseD. Statement-1 is false but Statement -2 is true
Answer» Correct Answer - c

Discussion

26.	Statement-1:Wrought iron is prpared by pudding process Statement-2:Pig iron is the purest form of ironA. Statement -1 is true, Statement-2 are true and Statement-2 is the correct explanation of Statement -1B. Statement -1 is true, Statement-2 are true and Statement-2 is not a correct explanation of Statement -1C. Statement-1 is true but Statement -2 is falseD. Statement-1 is false but Statement -2 is true
Answer» Correct Answer - c

Discussion

27.	Which of the following prtoducts is not formed at the anode in the hall -Heroult electrolysis process?A. `CO_(2)`B. `O_(2)`C. `Cl_(2)`D. `F_(2)`
Answer» Correct Answer - 3

Discussion

28.	(A) Reduction of `Cr_(2)O)(3)` with the Aluminium is possible ( R ) `DeltaG_((f))^(0) of Cr_(3)O_(3) " is -540kj//mole and" DeltaG_((f))^(0) ` `of Al_(2)O_(3) is -827kj//"mole"`A. If both (A) and (R ) are correct and (R ) is the correct explantion of (A )B. If both (A) and (R ) are correct and (R ) is not the correct explantion of (A )C. If (A) is correct but (R ) is incorrectD. If (A) is incorrect but (R ) is correct
Answer» Correct Answer - A

Discussion

29.	A sulphide ore like `ZnS` is first roasted into its oxide prior to reduction by carbon because:A. a sulphide ore cannot be reduced to metal at allB. no reducing agent is found suitable for reducing a sulphide oreC. the enthalpy of formation of `CO_(2)` is more than that of `CS_(2)`D. a metal oxide is generally less stable than the metal sulphide
Answer» Correct Answer - d

Discussion

30.	(A) The reduction reaction, `Cr_(2)O_(3)+2Al to Al_(2)O_(3)+2Cr, DeltaG^(0)=-421KJ` is not possible at room temperature (R ) Certain amount of activation energy is essential for the reaction to make it thermodynamically feasible.A. If both (A) and (R ) are correct and (R ) is the correct explantion of (A )B. If both (A) and (R ) are correct and (R ) is not the correct explantion of (A )C. If (A) is correct but (R ) is incorrectD. If (A) is incorrect but (R ) is correct
Answer» Correct Answer - A

Discussion

31.	(A): At 1200K iron can be reduce cuprous oxide (R )L: At 1200K, `Fe+Cu_(2)O to FeO+2Cu` `DeltaG=-300kj//"mole"`A. If both (A) and (R ) are correct and (R ) is the correct explantion of (A )B. If both (A) and (R ) are correct and (R ) is not the correct explantion of (A )C. If (A) is correct but (R ) is incorrectD. If (A) is incorrect but (R ) is correct
Answer» Correct Answer - A

Discussion

32.	Which of the following oxides is reduced by water gas to obtain the metal during its extraction?A. `Fe_(2)O_(3)`B. NiOC. ZnOD. `WO_(3)`
Answer» Correct Answer - B

Discussion

33.	Assertion : Ores are generally converted into oxides, prior to reduction. Reason : Metal oxides can be easily reduced.A. Statement - 1 is true , Statement -2 is True , Statement -2 is a correct explanation for statement -3B. Statement -1 : is true , Statement-2 is true , Statement -2 : Not a correct explanation for statement - 3C. Statement-1 : is true , Statement -2 is false ,D. Statement-1 : is false , statement-2 : is true
Answer» Correct Answer - c

Discussion

34.	Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides can be easily reduced .A. Statement - 1 is true , Statement -2 is True , Statement -2 is a correct explanation for statement -3B. Statement -1 : is true , Statement-2 is true , Statement -2 : Not a correct explanation for statement - 3C. Statement-1 : is true , Statement -2 is false ,D. Statement-1 : is false , statement-2 : is true
Answer» Correct Answer - c

Discussion

35.	Which of the following metal oxides are reduced by ` Co `?A. Sum of the `DeltaG` values for oxidation of metal and oxidation of reductant should be negativeB. Sum of the `DeltaG` values for oxidation of metal and oxidation of reductant should be positiveC. Sum of the `DeltaG` values for reduction of metal oxide and oxidation of reductant should be negativeD. Sum of the `DeltaG` values for oxidation of metal and reduction of reducant should be negative
Answer» Correct Answer - C

Discussion

36.	Choose the correct option of temperature at which carobon reduces FeO to iron and produces CO.A. Below temperature at point AB. Approximately at the temperature correcponding to point AC. Aboce temperature at point A but below tempeature at point D0D. Above temperature at point A
Answer» Correct Answer - D

Discussion

37.	Select the group of oxides that can not be reduced by carbon to give the respective matals. A. `CaO,K_(2)O`B. `Fe_(2)O_(3),ZnO`C. `Cu_(2)O,SnO_(2)`D. `Fe_(2)O_(3),PbP.`
Answer» Correct Answer - A

Discussion

38.	Near the top of the blast furnace, iron oxides are reduced to …… by carbon monoxide .A. CB. COC. `CO_(2)`D. `CaCO_(3)`
Answer» Correct Answer - 2

Discussion

39.	Match the following
Answer» Correct Answer - `Ato P"Btoq:ctop.r:Dtoq.r,s`

Discussion

40.	The ore that contains both iron and copper is:A. CupriteB. CualcociteC. ChalcopyriteD. Malachite and azurite are ores of copper
Answer» Correct Answer - c

Discussion

41.	which of the following processes involve smeltingA. `ZnCO_(3)overset("Heat")toZnO+CO_(2)`B. `2PbS+3O_(2)overset("Heat")to2PbO+2SO_(2)`C. `Al_(2)O_(3).2H_(2)Ooverset("Heat")toAl_(2)O_(3)+2H_(2)O`D. `Fe_(2)O_(3)+3Coverset("Heat")to2Fe+3CO`
Answer» Correct Answer - 4

Discussion

42.	To obtain chromium from chromic oxide `(Cr_(3)O_(3))` the method used isA. Carbon reductionB. Carbon monoxide reductionC. Alumino thermicD. Electrolytic reduction
Answer» Correct Answer - 3

Discussion

43.	Which of the following reaction is not involved in thermite process?A. `3Mn_(3)O_(4) + 8Al rarr 9Mn + 4Al_(2)O_(3)`B. `Cr_(2)O_(3) +2Al rarr Al_(2)O_(3) + 2Cr.`C. `2Fe + Al_(2)O_(3) rarr 3Al + Fe_(2)O_(3)`D. `B_(2)O_(3) + 2Al rarr 2B + Al_(2)O_(3)`
Answer» Correct Answer - A::B

Discussion

44.	Which of the following reaction is not involved in thermite process?A. `3 Mn_(3)O_(4)+8Al rarr 9Mn+Al_(2)O_(3)`B. `Cr_(2)O_(3)+2Al rarr Al_(2)O_(3)+2Cr`C. `2Fe+Al_(2)O_(3) rarr 2Al+Fe_(2)O_(3)`D. `B_(2)O_(3)+2Al rarr2B+Al_(2)O_(3)`
Answer» Correct Answer - 3

Discussion

45.	Name the reducing agent that is used in the thermite process?A. CB. ZnC. NaD. Al
Answer» Correct Answer - 4

Discussion

46.	Extraction of zinc from zinc blende is achieved by:A. Rositing following by redution with another metalB. Electrolytic reducationC. Roasting followee by redducation with carbon ,.D. Roasting followed by self reducaton
Answer» Correct Answer - c

Discussion

47.	Extraction of zinc from zinc blende is achieved by:A. elctrolytic reductionB. roasting followed by reduction with carbonC. roasting followed by reduction with another metalD. roasting followed by self reduction
Answer» Correct Answer - 2

Discussion

48.	Black tin isA. an alloy of SnB. an allotrope of SnC. `60-70% SnO_(2)`D. `100% SnO_(2)`
Answer» Correct Answer - C

Discussion

49.	The reducing agent used in thermite process isA. CB. ZnC. NaD. Al
Answer» Correct Answer - 4

Discussion

50.	Extraction of zinc from zinc blende is achieved by:A. electrolytic reductionB. roasting followed by reduction with carbon.C. roasting followed by reduction with another metal.D. rosting followed by self-reduction.
Answer» Correct Answer - B

Discussion

Explore topic-wise InterviewSolutions in .

In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by__________A. using collectorsB. adjusting the proportion of oil to waterC. using depressentD. using froth stablisers

Which of the following ores are concentrated by froth floatation?A. haematiteB. GalenaC. Copper pyritesD. Magnetite

the common impurities present in bauxite areA. CuOB. ZnOC. `Fe_(2)O_(3)`D. `SiO_(2)`

During the process of electrolyic refining of copper some metals present as impurity settle as anode mud. These areA. Sn and AgB. Pb and ZnC. Ag and AuD. Fe and Ni

The chemical composition of salg formed during the smelting process in the extraction of copper is :A. `Cu_(2)O+FeS`B. `FeSiO_(3)`C. `CuFeS_(2)`D. `Cu_(2)S++FeO`

The chemical composition of slag formed during the smelting process in the extraction of copper is :-A. `Cu_(2)O+FeS`B. `FeSiO_(3)`C. `CuFeS_(2)`D. `Cu_(2)S++FeO`

The metal A is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form a colourless solid from which hydrogen is released on treatment with water the metal isA. AlB. CaC. CuD. Zn

Aluminium is obtained by the electrolysis of pure of `Al_(2)O_(3)` dissolved inA. AluminaB. BauxiteC. CryoliteD. Felspar

The metal which cannot be obtained by electrolysis of aqueous solution of its salts isA. AgB. MgC. CuD. Al

An ore of tin containing `FeCrO_(4)` is concentrated by _____.A. Mangetic SeparationB. Froth floatation processC. Electrotatic methodD. Gravity separation

Method used for the concentration of tin stone ore isA. Hand pickingB. Froth FloatationC. Magnetic SeparationD. Leaching

The magnetic impurity present in cassiterite ore isA. SilicaB. WolframiteC. `SnO_(2)`D. Clay

Which among the following is a acidic fluxA. `SiO_(2)`B. `MgCO_(3)`C. `CaO_(3)`D. `Fe_(2)O_(3)`

Roasting of copper ore is carried out in which of the following furnace?A. Reverberatory furnaceB. Blast furnaceC. Either reverberatory furnace or blast furnaceD. Neither 1 nor 2

Smelling is usually carried out inA. Open hearth furnaceB. Blast furnaceC. Electric furnaceD. Muffle furnace

Metals which can be extracted by smelting process are :A. ZnsB. AlC. PbD. Fe

Which of the following metal can not be extracted by smelting processA. ZnsB. AlC. PbD. Fe

Match the items of Column I with items of Column II and assign the correct A. `{:(,A,B,C,D),(,1,2,4,5):}`B. `{:(,A,B,C,D),(,4,3,1,2):}`C. `{:(,A,B,C,D),(,3,4,2,1):}`D. `{:(,A,B,C,D),(,5,4,3,2):}`

Which of the following prtoducts is not formed at the anode in the hall -Heroult electrolysis process?A. `CO_(2)`B. `O_(2)`C. `Cl_(2)`D. `F_(2)`

Which of the following oxides is reduced by water gas to obtain the metal during its extraction?A. `Fe_(2)O_(3)`B. NiOC. ZnOD. `WO_(3)`

Choose the correct option of temperature at which carobon reduces FeO to iron and produces CO.A. Below temperature at point AB. Approximately at the temperature correcponding to point AC. Aboce temperature at point A but below tempeature at point D0D. Above temperature at point A

Select the group of oxides that can not be reduced by carbon to give the respective matals. A. `CaO,K_(2)O`B. `Fe_(2)O_(3),ZnO`C. `Cu_(2)O,SnO_(2)`D. `Fe_(2)O_(3),PbP.`

Near the top of the blast furnace, iron oxides are reduced to …… by carbon monoxide .A. CB. COC. `CO_(2)`D. `CaCO_(3)`

Match the following

The ore that contains both iron and copper is:A. CupriteB. CualcociteC. ChalcopyriteD. Malachite and azurite are ores of copper

which of the following processes involve smeltingA. `ZnCO_(3)overset("Heat")toZnO+CO_(2)`B. `2PbS+3O_(2)overset("Heat")to2PbO+2SO_(2)`C. `Al_(2)O_(3).2H_(2)Ooverset("Heat")toAl_(2)O_(3)+2H_(2)O`D. `Fe_(2)O_(3)+3Coverset("Heat")to2Fe+3CO`

To obtain chromium from chromic oxide `(Cr_(3)O_(3))` the method used isA. Carbon reductionB. Carbon monoxide reductionC. Alumino thermicD. Electrolytic reduction

Which of the following reaction is not involved in thermite process?A. `3Mn_(3)O_(4) + 8Al rarr 9Mn + 4Al_(2)O_(3)`B. `Cr_(2)O_(3) +2Al rarr Al_(2)O_(3) + 2Cr.`C. `2Fe + Al_(2)O_(3) rarr 3Al + Fe_(2)O_(3)`D. `B_(2)O_(3) + 2Al rarr 2B + Al_(2)O_(3)`

Which of the following reaction is not involved in thermite process?A. `3 Mn_(3)O_(4)+8Al rarr 9Mn+Al_(2)O_(3)`B. `Cr_(2)O_(3)+2Al rarr Al_(2)O_(3)+2Cr`C. `2Fe+Al_(2)O_(3) rarr 2Al+Fe_(2)O_(3)`D. `B_(2)O_(3)+2Al rarr2B+Al_(2)O_(3)`

Name the reducing agent that is used in the thermite process?A. CB. ZnC. NaD. Al

Extraction of zinc from zinc blende is achieved by:A. Rositing following by redution with another metalB. Electrolytic reducationC. Roasting followee by redducation with carbon ,.D. Roasting followed by self reducaton

Extraction of zinc from zinc blende is achieved by:A. elctrolytic reductionB. roasting followed by reduction with carbonC. roasting followed by reduction with another metalD. roasting followed by self reduction

Black tin isA. an alloy of SnB. an allotrope of SnC. `60-70% SnO_(2)`D. `100% SnO_(2)`

The reducing agent used in thermite process isA. CB. ZnC. NaD. Al

Extraction of zinc from zinc blende is achieved by:A. electrolytic reductionB. roasting followed by reduction with carbon.C. roasting followed by reduction with another metal.D. rosting followed by self-reduction.