InterviewSolution
Saved Bookmarks
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.
| 351. |
Match the items of Column I with items of Column II and assign the correct A. `{:(,A,B,C,D),(,2,3,4,1):}`B. `{:(,A,B,C,D),(,1,2,3,5):}`C. `{:(,A,B,C,D),(,5,4,3,2):}`D. `{:(,A,B,C,D),(,4,5,3,2):}` |
|
Answer» Correct Answer - `Ato2;Bto3;Cto4;Dto1` |
|
| 352. |
Match list-I with List-II |
|
Answer» Correct Answer - `(A)to(p);(B)to(q);(C)to(p,r);(D)to(p,s)` |
|
| 353. |
Match list-I with List-II |
|
Answer» Correct Answer - `(A)to(p,s);(B)to(p,s);(C)to(q,r);(D)to(q,r)` |
|
| 354. |
Match the ores of List-I with their composition in List-II |
|
Answer» Correct Answer - `(A)to(s);(B)to(s);(C)to(p,q);(D)to(r)` |
|
| 355. |
Match the ores of List-I with their composition in List-II |
|
Answer» Correct Answer - `(A)to(s);(B)to(s);(C)to(p,q);(D)to(r)` |
|
| 356. |
Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to remove the volatile impurities ,During roasting the ,mass becomes porous Iron in the form of ferrous oxide os mixed with coke and heated in a blast furnace ,pig iron ios formed and is casted in the desired shape. the composition of pig iron is shown asA. FeCB. `FE_(3)C`C. `FeC_(3)`D. `Fe_(2)C` |
|
Answer» Correct Answer - b |
|
| 357. |
Electrolytic reducation of `Al_(2)O_(3)` Electrolyte `(Al_(2)O_(3)+cryolite)` Cathode : fraphite inside Fe -Container Coke power is spreased over the molten elecoltye in order toA. Prevent the heat radiation from the surfaceB. Prevent corrosion of graphite anodeC. Prevent oxidation of molten aluminmum by airD. (A) and (B) both |
|
Answer» Correct Answer - d |
|
| 358. |
Electrolytic reducation of `Al_(2)O_(3)` Electrolyte `(Al_(2)O_(3)+cryolite) ` Cathode : fraphite inside Fe -Container The purpose of adding cryolite is :A. To increase eletrical consutivityB. To lower the melting point `Al_(2)O_(3)`C. To remove the impurities as slagD. Both (a) & (B) |
|
Answer» Correct Answer - d |
|
| 359. |
In the extraction of chlorine from brine_________A. `DeltaG^(o.)` for the overall reaction is negativeB. `DeltaG^(o.)` for the overall reaction is positiveC. `E^(o.)` for overall reaction has negative valueD. `E^(o.)` for oveall reaction has negative value |
|
Answer» Correct Answer - B::C |
|
| 360. |
Which of the following is/are correctly matched?A. Copper - Bessemer converter.B. Iron-Blast furnanceC. Chlromium -Aluminothermic processD. Tin- Electrolytic reduction |
|
Answer» Correct Answer - A::B::C |
|
| 361. |
which of the following statement is not correct ?A. Silver glance mainly contains silver sulphideB. Gold is found in native stateC. Zinc blende mainly contains `ZnCl_(2)`D. Copper pyrites also contains `Fe_(2)O_(3)` |
|
Answer» Correct Answer - C |
|
| 362. |
Which of the following set of elements mostly occur as sulphide ores.A. Zn, Cu,NaB. Zn, Cu, PbC. Fe, Al, TiD. Cu, Ag, Au |
|
Answer» Correct Answer - B |
|
| 363. |
Which of the following statement is not correctA. Silver glance mainly contains silver sulphideB. Gold is found in native stateC. Zinc blende mainly contains `ZnCl_(2)`D. Copper pyrites also contains `Fe_(2)O_(3)` |
|
Answer» Correct Answer - C |
|
| 364. |
Leaching can be used for the extraction of which metals (i) Pb (ii) Al (iii) Ag (iv) AuA. (ii) (iii) and (iv)B. (i) (ii) and (iii)C. (ii) and (iv)D. (iii) and (iv) |
|
Answer» Correct Answer - A |
|
| 365. |
(A) All minerals are ores (R ) Ores are minerals from which metal can be extracted convenitly and economicallyA. 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 - D |
|
| 366. |
Statement `N` atom has two different oxidation states in `NH_(4)NO_(2)`. Explanation One `N` atom has-`ve` oxidation number as it is attached with less electronegative `H`-atom and other has `+ve` oxidation number as it is attached with more electronegative atom.A. One has different natuer of oxide than other two -Zn, Al BB. One is not extracted by carbon reduction but other two are -Sn, Ag. Zn(from their ore)C. I, II and IIID. I, II and IV |
|
Answer» Correct Answer - C |
|
| 367. |
In the elctrolysis refinin of copper, Ag and Au are found:A. on cathodeB. on anodeC. iin the acidic mudD. in the cathodic mud |
|
Answer» Correct Answer - C |
|
| 368. |
The cathode used in the electrolytic cell during aluminium extraction is made ofA. AluminiumB. Carbon liningC. IronD. Steel |
|
Answer» Correct Answer - B |
|
| 369. |
Which of the following is not a correct statementA. What cast iron contains carbon in the form of `Fe_(3)C`B. Grey cast iron contains carbon in the form of graphite.C. The quality of steel produced in Bessemer converter is very highD. The quality of steel produced in open hearth process can be checked from time to time. |
|
Answer» Correct Answer - C |
|
| 370. |
Which of the following techniques is used in the manufacture of aluminium from bauxiteA. Reduction with magnesiumB. reduction with cokeC. Electrolytic reductionD. Reduction with iron |
|
Answer» Correct Answer - C |
|
| 371. |
Pudding process is used in the manufacture ofA. Wrougt ironB. Pig ironC. SteelD. Cast iron |
|
Answer» Correct Answer - A |
|
| 372. |
Belgian process is used for the extraction ofA. CuB. AgC. ZnD. Fe |
|
Answer» Correct Answer - C |
|
| 373. |
The impurity present in Blister copper isA. FeSB. `Cu_(2)O`C. `Cu_(2)S`D. FeO |
|
Answer» Correct Answer - a |
|
| 374. |
In Bessemer converter `Cu_(2)S` is converted in to blister copper inA. self reductionB. reduction with cokeC. reduction with coal gasD. reduction with `H_(2)` gas |
|
Answer» Correct Answer - A |
|
| 375. |
In the metallurgy of copper, blister copper is obtained fromA. Bessemer converteerB. Reverberatory furnaceC. Blast furnaceD. Electrolytic tank |
|
Answer» Correct Answer - 1 |
|
| 376. |
A metal contains, metal oxide as impurity. The method used to refine this metal isA. PolingB. LiqationC. CupellationD. Distallation |
|
Answer» Correct Answer - A |
|
| 377. |
Which of the following pari of metals is purified by VanArkel methodA. Ga and InB. Zr and TiC. Ag and AuD. Ni and Fe |
|
Answer» Correct Answer - B |
|
| 378. |
Which of the following pairs of metals is purified by VanArkel methodA. Ga and InB. Zr and TiC. Ag and AuD. Ni and Fe |
|
Answer» Correct Answer - B |
|
| 379. |
The metal for which, its property of formation of volatile complex is takeninto account fpr its extraction isA. NickelB. IronC. CobaltD. Vanadium |
|
Answer» Correct Answer - 1 |
|
| 380. |
One of the following metals froms a volatile corbony1 compound and this property is taken advantage of its extraction. This metal isA. NickelB. IronC. CobaltD. Vanadium |
|
Answer» Correct Answer - 1 |
|
| 381. |
Assertion : Zirconium can be purificed by Van Arkel method. Reason : `ZrI_(4)` is volatile and decomposed at `1800 K`. |
|
Answer» Correct Answer - 2 |
|
| 382. |
Assertion : Sulphide ores are concentrated by Froth Floatation method. Reason : Cresols stabilise the froth in Froth Floatation method |
|
Answer» Correct Answer - 2 |
|
| 383. |
Assertion : Froth flatation process is used to concentrate sulphide ores. Reason : There is a difference in the nature of wettibility of different ores.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 - a |
|
| 384. |
Which of the following reaction is an example of autoreduction?A. `Fe_(3)O_(4)+4CO rarr 3Fe+4CO_(2)`B. `Cu_(2)O+C rarr 2Cu+Co`C. `Cu^(2+)(aq)+Fe(S) rarr Cu(s)+Fe^(2+)(aq)`D. `Cu_(2)O+(1)/(2)Cu_(2)Srarr 3Cu+(1)/(2)SO_(2)` |
|
Answer» Correct Answer - D |
|
| 385. |
Which among the following is used as solder.A. Cu and PbB. Zn and CuC. Pb and SnD. Fe and Zn |
|
Answer» Correct Answer - C |
|
| 386. |
Which of the following reaction is an example of autoreduction?A. `Fe_(3)O_(4)+4COto3Fe+4CO_(2)`B. `Cu_(2)O+Cto2Cu+CO`C. `Cu^(2+)(aq)+Fe(s)toCu(s)+Fe^(2+)(aq)`D. `Cu_(2)O+(1)/(2)Cu_(2)Sto3Cu+(1)/(2)SO_(2)` |
|
Answer» Correct Answer - 4 |
|
| 387. |
Which of the following reactions is an example of autoreduction?A. `Fe_(3)O_(4)+4CO rarr 3Fe+4CO_(2)`B. `Cu_(2)O+C rarr 2Cu+Co`C. `Cu^(2+)(aq)+Fe(S) rarr Cu(s)+Fe^(2+)(aq)`D. `Cu_(2)O+(1)/(2)Cu_(2)Srarr 3Cu+(1)/(2)SO_(2)` |
|
Answer» Correct Answer - D |
|
| 388. |
Addition of high proportion of manganese makes steel useful in making rails of rail roads , because manganese:A. gives hardness of steelB. helps the formation of oxides of ironC. can remove oxygen onlyD. can show highest oxidation state of +7 |
|
Answer» Correct Answer - A |
|
| 389. |
Addition of high proprotions of manganese makes steel useful in making rails of railrods , because manganse (i) Givens hartdness to steeel (II) Help the foramtiion of ocides of iron (iii) can remove oxy gen and sulpur (iv) Can show highest oxidation state of +7A. I,ii,iiiB. I,iiiC. ii,ivD. I,iii,iv |
|
Answer» Correct Answer - b |
|
| 390. |
Among the following statement the incorrect onr is (IIT -1997)A. Calamine and siderite are carbonateB. Argentite and cuprite are oxidesC. Zinc blande and pyrites are sulphideD. Malachite and azurite are ores of copper |
|
Answer» Correct Answer - b |
|
| 391. |
Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence ofA. NitrigenB. OxgenC. `CO_(2)`D. Argin |
|
Answer» Correct Answer - b |
|
| 392. |
Chemical leaching is useful in the concentration of:A. copper pyritesB. bauxiteC. galenaD. cassiterite |
|
Answer» Correct Answer - 2 |
|
| 393. |
Name the metal M which is extracted on the basis of following reactions: `4M+8NaCN+2H_(2)O+O_(2)to` `4NaM(CN)_(2)+4NaOH` `2NaM(CN)_(2)+ZntoNa_(2)Zn(CN)_(4)+2M`A. Au or AgB. HgC. NiD. Fe |
|
Answer» Correct Answer - 1 |
|
| 394. |
`4M(s)+overset(Ө)(C)N(aq.)+2H_(2)O(aq.)+O_(2)(g)` `" " to 4[M(CN)_(2)]^(Ө)(aq.)+4overset(Ө)(O)H(aq.)A. `[Ag(CN)_(2)]^(-),[Zn(CN)_(6)]^(-4)`B. `AgCN,[Zn(CN)_(4)]^(-2)`C. `[Ag(CN)_(4)]^(-3),[Zn(CN)_(4)]^(-2)`D. `[Ag(CN)_(2)]^(-),[Zn(CN)_(4)]^(-2)` |
|
Answer» Correct Answer - D |
|
| 395. |
Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. Coke powder is spreadded over the molten electrolyte due toA. Prevent the loss of heat radiation from the surfaceB. prevent corrosion of graphiteC. prevent oxidation of molten aluminium by airD. (a) both (b) |
|
Answer» Correct Answer - b |
|
| 396. |
Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. What is wrong if anode is made of nickel instant of graphite?A. Ni is costlyB. Anode will be affected by produced `Cl_(2)`C. Graphite remain unaffected by produced COD. Nickel May be affected by high temperature. |
|
Answer» Correct Answer - d |
|
| 397. |
The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reaction of extractive metallurgy. At `1000^(@)C`, which reaction is spontaneous to a maximum extentA. `MgO+C rarr Mg+CO`B. `ZnO+Crarr Zn+CO`C. `MgO+Zn rarr Mg+ZnO`D. `ZnO+Mg rarrZn+MgO` |
|
Answer» Correct Answer - b |
|
| 398. |
The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reaction of extractive metallurgy. At `1000^(@)C`, which reaction is spontaneous to a maximum extentA. `MgO+C rarr Mg+CO`B. `ZnO+Crarr Zn+CO`C. `MgO+Zn rarr Mg+ZnO`D. `ZnO+Mg rarrZn+MgO` |
|
Answer» Correct Answer - b |
|
| 399. |
The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reaction of extractive metallurgy. At what approximate temprature, zinc and carbon have equal affinity for oxygen?A. `1000^(@)`CB. `1500^(@)`CC. `500^(@)C`D. `1200^(@)C` |
|
Answer» Correct Answer - b |
|
| 400. |
The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reaction of extractive metallurgy. To make the following reduction process spontaneous, temperature should be `ZnO+C rarr Zn+CO`A. `lt 1000&(@)C`B. `gt1000^(@)C`C. `lt 500^(@)C`D. `gt 500^(@)C " but " lt 1000^(@)C` |
|
Answer» Correct Answer - a |
|