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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Which of the following is used for the seperation of ZnS and PbS during the froth flotation process?A. KClB. KCNC. `NH_(4)NO_(3)`D. None of these |
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Answer» Correct Answer - 2 |
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| 102. |
Mac Arthur process is used forA. AgB. `O_(2)`C. FeD. Cl |
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Answer» Correct Answer - 1 |
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| 103. |
Which of the following statements are correct in connection with the extraction of silver?A. When the lead -silver alloy is rich in lead ,lead is removed by the cupellion processB. When the lead -silver alloy is rich in lead ,lead is removed by park,e or pattinsion ,s processC. Zinc forms ann alloy with lead ,g=from which lead is separated by distillationD. Zinc forms an alloy with silver ,from which zinc is sepatated by distillation |
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Answer» Correct Answer - 3 |
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| 104. |
How many of the following statement is/are corret regarding silver extraction process.A. When the lead -silver alloy is rich in lead ,lead is removed by the cupellion processB. When the lead -silver alloy is rich in lead ,lead is removed by park,e or pattinsion ,s processC. Zinc forms ann alloy with lead ,g=from which lead is separated by distillationD. Zinc forms an alloy with silver ,from which zinc is sepatated by distillation |
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Answer» Correct Answer - 3 |
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| 105. |
Identify the correct matchA. Leaching : Ag and AuB. Hydralauic washing : Sulphide oresC. Froth floatation : Oxide and carbonate oresD. Magnetic seperation : Silicates |
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Answer» Correct Answer - 1 |
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| 106. |
Salt which is (are) least likely to find in mineralsA. ChlorideB. SulphateC. NitrateD. Sulphide |
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Answer» Correct Answer - 3 |
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| 107. |
The major role of fluorpar (`CaF_2` ) which added in small quantities in the electrolyte reduction of alumina dissolved in fused cryolite `(N_(3)AlF_(6)` ) isA. As a catalystB. to make the fused mixture for reductionC. to lower the temperature of the melt.D. to decrease the rate of oxidation of carbon at the anode |
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Answer» Correct Answer - B::C |
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| 108. |
Why lime stone is added in the extraction of lead from galena?A. It prevents the formation of `PbSO_(4)`B. It removes the impurity of silica as fusible slag.C. It converts lead silicate to lead oxideD. It moves the impurity of iron oxide as fusible slag. |
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Answer» Correct Answer - A::B::C |
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| 109. |
Match the items of Column I with items of Column II and assign the correct A. `{:(,A,B,C,D),(,4,2,3,1):}`B. `{:(,A,B,C,D),(,2,3,1,5):}`C. `{:(,A,B,C,D),(,1,2,3,4):}`D. `{:(,A,B,C,D),(,3,4,5,1):}` |
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Answer» Correct Answer - `Ato4;Bto2;Cto3;Dto1` |
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| 110. |
For the metallurgical process of which of the ores calcined ore can be reduced by carbon?A. haematiteB. CalamineC. Iron pyritesD. Sphalerite |
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Answer» Correct Answer - 1,2 |
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| 111. |
Which of the following metallurgical process does not involve heating?A. smeltingB. calcinationC. rastingD. levigation |
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Answer» Correct Answer - 4 |
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| 112. |
In sulphation roasting of `ZnS` products areA. `ZnO+ZnSO_(4)+SO_(2)`B. `ZnCl_(2)`C. `ZnO+SO_(2)`D. `Zn+SO_(2)` |
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Answer» Correct Answer - 3 |
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| 113. |
Which one of the following is not a basic flux –A. BoraxB. CaOC. `SiO_(2)`D. `P_(2)O_(5)` |
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Answer» Correct Answer - 2 |
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| 114. |
Boron can be obtained by various methods but not byA. Reduction of `B_(2)O_(3)` with MgB. Pyrolysis of `BI_(3)` (van Arkel)C. Reducing `BCI_(3)` with `H_(2)`D. electrolysis of fused `BCl_(3)` |
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Answer» Correct Answer - D |
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| 115. |
Which of the following are methods of concentration of mineralsA. girvity separationB. Froth floation processC. electromagnetic separationD. smelting |
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Answer» Correct Answer - A::B::C |
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| 116. |
Which of the following reactions occurs during smelting in the reduction zone (in iron metallurgy)?A. `CaO+SiO_(2) rarr CaSiO_(3) `(slag)B. `Fe_(2)O_(3)+3C rarrn 2Fe +CO`C. `Fe_(2)O_(3)rarr Fe + CO`D. `CO_(2)+C rarr 2CO` |
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Answer» Correct Answer - B |
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| 117. |
Boron can be obtained by various methods but not by :A. Reduction of `B_(2)O_(3)` with MgB. Pyrolysis of `BI_(3)` (van Arkel)C. Reducing `BCI_(3)` with `H_(2)`D. electrolysis of fused `BCl_(3)` |
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Answer» Correct Answer - D |
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| 118. |
Function of the flux added during smelting isA. to make the ore porousB. to facilitate reductionC. to remove gangueD. to facilitate oxidation |
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Answer» Correct Answer - 3 |
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| 119. |
Which one of the following reactions occur during smelting in the reduction zone at lower temperature(in iron metallurgy)?A. `CaO+SiO_(2) rarr CaSiO_(3) `(slag)B. `Fe_(2)O_(3)+3C rarrn 2Fe +CO`C. `Fe_(2)O_(3)rarr Fe + CO`D. `CO_(2)+C rarr 2CO` |
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Answer» Correct Answer - B |
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| 120. |
Incorrect statement about the manufacture of steel from pig iron isA. The quality of steel manufactured in open hearth process is very highB. The composition of steel can be controlled in Bessemer processC. Iron ore, scrap iron and low grade pig iron can not be used in Bessemer processD. Loss of iron due to slag formation is minimised in open hearth process |
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Answer» Correct Answer - 2 |
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| 121. |
For which of the following metal, the carbon reduction cannot be used ?A. LeadB. MagnisiumC. SodiumD. Iron |
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Answer» Correct Answer - b,c |
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| 122. |
Generally sulphide ores are concentrated by following processA. Hand pickingB. Washing with waterC. LeachingD. Froth floatation |
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Answer» Correct Answer - D |
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| 123. |
Froth floatation process used for the concentration of sulphide ore. Which of the following statements are correct (a) It is based on the difference in wettablity of different minerals (b) Sodium ethyl xanthat, `C_(2)H_(2)OCS_(2)` Na is used as collector (c ) NaCN is used as depressant of ZnS and PbSA. (a),(b) only correctB. (b) (c ) only correctC. (a),(c ) only correctD. (a), (b) ( c) are correct |
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Answer» Correct Answer - 4 |
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| 124. |
Mark the wrong staement among the following. The iron ore after washing is roasted with a little coasl in excess of air. During roastingA. Moistuyre is removedB. As and S are removed in the form of their volatile oxidesC. Any ferrous oide is oxidised to ferric oxide.D. The mass becomes compact and thus makes it sutiable for ready reduction to metallic iron. |
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Answer» Correct Answer - D |
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| 125. |
The froth floatation process is used for the concentration ofA. ore having low density ore having magnetic natureB. ore having magnetic natureC. ore having high densityD. ore having water soluble gangue |
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Answer» Correct Answer - A |
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| 126. |
Roasted tin-stone ore after washing with water is known asA. Moistuyre is removedB. As and S are removed in the form of their volatile oxidesC. Any ferrous oide is oxidised to ferric oxide.D. The mass becomes compact and thus makes it sutiable for ready reduction to metallic iron. |
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Answer» Correct Answer - D |
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| 127. |
Which of the following metals can be oriented directly during the roasting of its sulphide oreA. HgB. ZnC. FeD. Ca |
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Answer» Correct Answer - A |
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| 128. |
The method used for the enrichment of sulphide ores of copper isA. Mangetic SeparationB. Froth floatation processC. Electro refiningD. Smelting |
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Answer» Correct Answer - 2 |
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| 129. |
The earthy impurities present in the mineral are calledA. FluxB. slagC. gangueD. refractory material |
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Answer» Correct Answer - C |
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| 130. |
Consider the following orders (I) `MgOgtAl_(2)O_(3)gtCr_(2)O_(3)gtFe_(2)O_(3)` (Thermal stability) (II) `CaOgtMgOgtZnO gtPbO` (Temperature at which reduction by carbon takes place at least theoretically) (III) `Cr_(2)O_(3)gtFe_(2)O_(3)gtMgO` (Temperature at which reduction by Al takes place)A. II,IIIB. I,IIIC. I,IID. None of these |
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Answer» Correct Answer - C |
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| 131. |
Hand picking method is used for the concentration of the following oreA. CassiteriteB. HaematiteC. CalamineD. Galena |
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Answer» Correct Answer - B |
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| 132. |
Which of the following produce `Cr_(2)O_(3)` along with `O_(2)` ?A. II,IIIB. I,IIIC. I,IID. None of these |
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Answer» Correct Answer - C |
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| 133. |
Formula of ruby copper isA. `Cu_(2)O`B. `Cu_(2)S`C. `CuCo_(3).Cu(OH)_(2)`D. `CuFeS_(2)` |
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Answer» Correct Answer - A |
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| 134. |
Essential constituent of amalgam isA. Alkali metalB. SilverC. MercuryD. Iron |
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Answer» Correct Answer - C |
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| 135. |
The ore having two metal atoms isA. HaemititeB. GalenaC. MagnatiteD. Copper pyrites |
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Answer» Correct Answer - D |
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| 136. |
Malachit is ore ofA. SilverB. MercuryC. MagnesiumD. Copper |
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Answer» Correct Answer - D |
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| 137. |
Composition ofAzurite mineral ofA. `CuCo_(3).CuO`B. `Cu(HCo_(3))_(2).Cu(OH)_(2)`C. `2CuCo_(3).Cu(OH)_(2)`D. `2CuCo_(3).2Cu(OH)_(2)` |
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Answer» Correct Answer - C |
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| 138. |
Which of the following reaction occur during calcination ?A. `CaCO_(3)toCaO+CO_(2)`B. `2FeS_(2)+(11)/(2)O_(2)toFe_(2)O_(3)+4SO_(2)`C. `Al_(2)O_(3).xH_(2)OtoAl_(2)O_(3)+xH_(2)O`D. `ZnS+(3)/(2)O_(2)toZnO+SO_(2)` |
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Answer» Correct Answer - 1,3, |
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| 139. |
Galena (PbS) on heating in limited supply of air gives lead metal. This is known asA. SmeltingB. CalcinationC. Self reductionD. Sulphatizing roasting |
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Answer» Correct Answer - C |
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| 140. |
The correct statement (s) is/areA. generally the calcination and roasting is done in Blast furnaceB. the sandy and rocky material associated with ore are called matrix.C. froath floatation process is suitable for sulphide ores.D. Substance that reacts with ganue f to from fusible mass is called slag. |
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Answer» Correct Answer - B::C |
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| 141. |
Statement-1: The reduction of a metal oxide is easier if the metal formed is in liquid state at the temperature of reduction. Statement-2: The value of entropy changes `DeltaS` of the reduction process is more on + ve side when the metal formed is in liquid state and the metal oxide being reduced is in solid state. Thus the value of `DeltaG^(0)` becomes more on negative side.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 |
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Answer» Correct Answer - a |
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| 142. |
Which of the followigng metal is obtained by the reduction of metal oxide with Hydrogen gasA. CuB. AlC. MgD. Fe |
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Answer» Correct Answer - A |
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| 143. |
Which of the following metals can be oriented directly during the roasting of its sulphide oreA. CuB. ZnC. FeD. Ca |
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Answer» Correct Answer - A |
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| 144. |
Roasting is carried out to :A. convert sulphide to oxide and sulphateB. remove water of hydrationC. melt the oreD. remove arsenic and sulphur impurities |
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Answer» Correct Answer - A::B::D |
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| 145. |
Roasting is carried out in case of:A. Iron pyritesB. GalenaC. Copper glanceD. All |
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Answer» Correct Answer - 4 |
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| 146. |
Which of the following statements is correct?A. In Hall-Heroult process, the electrolyte used a molten mixture of alumina, sodium hydroxide and cryolite.B. Lead is extracted from its chef ore by both carbon reduction and self ruduction.C. Tin is extracted from its chief ore by carbon monoxide reduction.D. Siderite, cassiterite and argenjtite are cabonate ores. |
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Answer» Correct Answer - B |
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| 147. |
Cyanide proces is used for the extraction ofA. BariumB. SilverC. BoronD. Zinc |
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Answer» Correct Answer - B |
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| 148. |
Match column (I) with column (II) and select the correct answer using codes given bleow in the lists. `{:("Column I","Column II"),("(i) Cyanide process","(a) Extraction of Al"),("(ii) Self reduction","(b) Extraction of Ag"),("(iii) Electrolytic reduction","(c) Extyraction of Cu"),("(iv) Carbon reduction","(d) Extraction of Sn"):}`A. (i)-(b), (ii)-(c ),(iii)-(a),(iv)-(d)B. (i)-(b),(ii)-(d),(iii)-(a),(iv)-(c )C. (i)-(d),(ii)-(a),(iii)-(d),(iv)-(a)D. (i)-(c ),(ii)-(b),(iii)-(d), (iv)-(a) |
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Answer» Correct Answer - A |
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| 149. |
Froth flatiationA. is a physical method of separation mineral from gangue.B. is method to concentrate the ore depending on the difference in wetability of gangue and the ore.C. Is used for the sulhide ores.D. Is a method in which ore sink to the bottom |
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Answer» Correct Answer - B::C |
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| 150. |
Which of the following are method of concentration of ore is metals?A. girvity separationB. Froth floation processC. electromagnetic separationD. smelting |
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Answer» Correct Answer - A::B::C |
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