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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.
| 301. |
The fuel used in Belgion process isA. water gasB. producer gasC. CokeD. Coal |
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Answer» Correct Answer - B |
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| 302. |
Extraction of aluminium can be understood by : Electrolytric reduction of `Al_(2) O_(3)` : Electrolysis : `Al_(2) O_(3) + Cryolite + CaF_(2)` Cathode : Carbon inside the `Fe` container Anode : Graphite rods. 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) |
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Answer» Correct Answer - d |
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| 303. |
Extraction of aluminium can be understood by : Electrolytric reduction of `Al_(2) O_(3)` : Electrolysis : `Al_(2) O_(3) + Cryolite + CaF_(2)` Cathode : Carbon inside the `Fe` container Anode : Graphite rods. The purpose of adding cryolite is.A. ni is costlyB. Anode will be affected by the prouct formedC. Graphite remain unaffected by prouced `F_(2)`D. nikkel may be affected at high temperature |
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Answer» Correct Answer - b |
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| 304. |
Extraction of aluminium can be understood by : Electrolytric reduction of `Al_(2) O_(3)` : Electrolysis : `Al_(2) O_(3) + Cryolite + CaF_(2)` Cathode : Carbon inside the `Fe` container Anode : Graphite rods. The purpose of adding cryolite is.A. Prevent the heat radiation from the surfaceB. Prevent corrosion of graphite anodeC. Prevent oxidation of molten aluminmum by airD. (A) and (B) both |
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Answer» Correct Answer - d |
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| 305. |
In the extraction of aluminium , the function of cryolite is to:A. Lower the melting point of alumiaB. Increase the melting point of aluminaC. Remove impurities from aluminaD. Minimise the anodic effect |
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Answer» Correct Answer - A |
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| 306. |
In the elactrolytic extraction of aluminium, cryolite is used.A. Lower the melting point of alumiaB. Increase the melting point of aluminaC. Remove impurities from aluminaD. Minimise the anodic effect |
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Answer» Correct Answer - A |
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| 307. |
How many of the following statement is /are ture for calcination of metal ore ?A. (i) It makes the ore more porousB. (II) the opre heated to a tempature just its melting pointC. hydrated oxides lose their water of crystlliationD. Impurities of S,As and Sb are |
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Answer» Correct Answer - 2 |
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| 308. |
Extraction of silver from `Ag_(2)S` by the use of sodium cyanide is example ofA. `NaSO_(4)`B. `Na_(2)S`C. `2Na[Ag(CN)_(2)]`D. `Na_(2)ZnSO_(4)` |
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Answer» Correct Answer - C |
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| 309. |
For which of the following metal (s) Bessemerisation process is important? I: Fe, II: Cu, III: Al, IV :Silver :A. I,IIB. II,IIIC. I,IIID. All |
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Answer» Correct Answer - A |
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| 310. |
Bessemerisation is carried out forA. Fe ,B. Cu,C. Al,D. Silver |
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Answer» Correct Answer - A::B |
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| 311. |
Bessemerisation is carried out forA. MagnesiumB. IronC. SilverD. Copper |
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Answer» Correct Answer - B::D |
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| 312. |
Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ors of copper include chalcanthite `(CuSO_(4).5H_(2)O)` , atacamite `(Cu_(2)Cl(OH)_(3))`, cuprite `(Cu_(2)O)`, copper glance `(Cu_(2)S)` and malachite `(Cu_(2)(OH)_(2)CO_(3))`. However , `80%` of the world copper production comes from the ore chalcopyrite `(CuFeS_(2))`. the extraction of copper from chalcopyrite involves partial roasting, removla of iron and self- reduction. Partial roasting of chalcopyrite produces |
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Answer» Correct Answer - A |
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| 313. |
Blister copper is refined by stirring moltem impure metal with green logs of wood because such a wood liberated hydrocarbon gases like `(CH_(4))`. The process X is called _____ and the Metal contains impurity of Y is ____:A. X=cupellation, Y=`CuO_(2)`B. X=poling, Y=`Cu_(2)O`C. X=poling, Y=CuOD. X=cupellation, Y=CuO |
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Answer» Correct Answer - 2 |
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| 314. |
Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed among other minerals. It may be extracted by treating the crushed rock with aearated sodium cyanide solution. During this process metallic gold is slowly converted to `[Au(CN)_(2)]^(-)`, Which is soluble in water. After equilibrium has been reached, the aqueous phase is pumped off and the metallic gold is recoverd form it by reacting the gold complex with zinc, whihc is converted tio `[Zn(CN)_(4)]^(2-)`. Gold in nature is frequently alloyed with silver. which is also oxidised vy aerated sodium by aerated sodium cyanide solution. The correct ionic reaction for the process are:A. ore dressingB. pyrometallurgical extractionC. hydrometallurgical extractionD. purification of metal. |
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Answer» Correct Answer - d |
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| 315. |
Metals of high purity are obtained by zone refining. Impurities are more soluble in melt in pure metal.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 - b |
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| 316. |
Which of the following methods is useful for separating pure forms of low melting metals?A. LiquidationB. DistillationC. PolingD. Vapour phase refining |
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Answer» Correct Answer - 1 |
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| 317. |
Which one of the following forms of iron can give other forms of iron?A. Wrought ironB. Cast ironC. Pig ironD. Spiegel |
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Answer» Correct Answer - 1 |
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| 318. |
During the extraction of iron, slag produced isA. Zone of heat absorptionB. Zone of reduction onlyC. Zone of fusion onlyD. Zone of reduction and zone of fusion |
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Answer» Correct Answer - 1 |
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| 319. |
Which of the following common element(s) is/are present in the anode mud in elctrolytic refining of copper ?A. SeleniumB. TelluriumC. SilverD. Gold |
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Answer» Correct Answer - A::B::C::D |
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| 320. |
Which of the following statement(s) is/are correct about slag?A. The chemical composition of slag obtained in the extraction of copper from copper pyrites is `PbSiO_(3)` .B. The calcium silicate , `CaSiO_(3)` is obtained is slag formation zone in the extraction zone in the extraction of iron from haemattie ore.C. In blast furnace/Bessemer converter , the upper layer of molten liquid (i.e. molten metal is of slag.D. The slag is fusible matter |
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Answer» Correct Answer - B::C::D |
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| 321. |
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. to acts as a catalystB. to make the fused mixture very conducting.C. to increase 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 |
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| 322. |
Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following processes. (i) Concentration (ii) Calcination |roasting | leaching (iii) Reduction. It is carried out by one of the following methods. (a) Carbon |carbon monoxide reduction. (b) Self reduction. (c) Electrolytic reduction. (d) Reduction by more electropositiv metal (i.e displacement method). Which of the following reaction does not occur in Bessener converter in the extraction of copper from chalcopyrites.A. `2Cu FeS_(2)+O_(2) rarr Cu_(2)S+2FeS+SO_(2)`B. `FeO+SiO_(2) rarrFeSiO_(3)`C. `2FeS+3O_(3) rarr 2FeO+2SO_(2)`D. `Cu_(2)S+2Cu_(2)O rarr 6Cu+SO_(2)` |
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Answer» Correct Answer - d |
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| 323. |
Assertion : Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal. Reason : Copper is extracted by hydrometallurgy. |
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Answer» Correct Answer - 2 |
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| 324. |
How many of the following are metal carbonates : Dolomite ,Malachite ,Azurite ,Siderite Calamine , Magnasite ,Limestone ,Washing soda ,Cerussite |
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Answer» Correct Answer - 9 |
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| 325. |
In extraction of metal how many of the following ores calcination process is involved . (i) Dolomite (ii) Malachite (iii) Calcite (iv) Copper pyrities (v) Sylcine (vi) Cryolite (vii) Siderite (viii) Iron pyrite (ix) Ar gentite |
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Answer» Correct Answer - 4 |
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| 326. |
Themost abundent ore of iron isA. haematiteB. limoniteC. magnetiteD. siderite |
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Answer» Correct Answer - 1 |
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| 327. |
Name the metal M which is extracted on the basis of following reactions : `4M + 8CN^(-)+2H_(2)O+O_(2) rarr 4[M(CN)_(2)]^(-)+4OH^(-)` ` 2[M(CN)_(2)]^(-)+Zn rarr [Zn(CN)_(4)]^(2-)+ 2M`A. Au or AgB. HgC. NiD. Fe |
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Answer» Correct Answer - 1 |
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| 328. |
Name the metal M which is extracted on the basis of following reactions : `4M + 8CN^(-)+2H_(2)O+O_(2) rarr 4[M(CN)_(2)]^(-)+4OH^(-)` ` 2[M(CN)_(2)]^(-)+Zn rarr [Zn(CN)_(4)]^(2-)+ 2M`A. Au or AgB. HgC. NiD. Fe |
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Answer» Correct Answer - 1 |
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| 329. |
Brine is electrolysed by using inert electrodes. The reaction at anode is_______A. `Cl^(-)(aq)to(1)/(2)Cl_(2)(g)+e^(-), E_(Cell)^(otimes)=1.36V`B. `2H_(2)O(l)toO_(2)(g)+4H^(+)+4e^(-), E_(Cell)^(otimes)=1.23V`C. `Na^(+)(aq)+e^(-)toNa(s), E_(Cell)^(otimes)=2.71V`D. `H^(+)(aq)+e^(-)to(1)/(2)H_(2)(g), E_(Cell)^(otimes)=0.00V` |
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Answer» Correct Answer - 1 |
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| 330. |
Why does not stainless steel get rusted easily ?A. Chromium and nickel combine with ironB. Chromium forms an oxide layer and protects iron from rustingC. Nickel present in it, does not rustD. Iron forms a hard chemical compound with chromium present in it. |
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Answer» Correct Answer - 2 |
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| 331. |
Annealing process isA. heating the steel bright red and then cooling suddenlyB. heating the steel bright red and then cooling slowlyC. heating the rod of iron embedded in charcolD. heating the rods of iron in ammonia |
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Answer» Correct Answer - 2 |
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| 332. |
Nitriding is a process of heating steel in atmosphere of :A. ammoniaB. oxygenC. carbondioxideD. air |
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Answer» Correct Answer - 1 |
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| 333. |
Assertion : Nitriding is the process of heating steel in presence of `N_(2)` to form iron nitrides. Reason : The surface of steel becomes hard after nitriding process.A. Statement - 1 is true , Statement -2 is True , Statement -2 is a correct explanation for statement -2B. Statement -1 : is true , Statement-2 is true , Statement -2 : Not a correct explanation for statement - 2C. Statement-1 : is true , Statement -2 is false ,D. Statement-1 : is false , statement-2 : is true |
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Answer» Correct Answer - d |
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| 334. |
If red hot steel is suddenly immersed in water, the steel becomes:A. soft and malleableB. hard and brittleC. tough and ductileD. fibrous |
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Answer» Correct Answer - 2 |
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| 335. |
Which formation of iron is least ductile?A. Hard steelB. Cast ironC. Mild steelD. Wrought iron |
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Answer» Correct Answer - 2 |
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| 336. |
Wrought iron is resistant to rusting and corrosion due to the presence ofA. Cementite `(Fe_(3)C)`B. Low percentage of carbonC. `CaSiO_(3) & FePO_(4)` SlagesD. `MnSiO_(3)& FePO_(4)`slages |
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Answer» Correct Answer - 4 |
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| 337. |
The Ellingham diagram for a number of metallic sulphides is reproduced below. Answer the questions given below : (iii) Which of the following sulphides can be reducted to metal by `H_(2)` at about `1000 K` ?A. HgSB. PbSC. `CS_(2)`D. `Bi_(@)S_(3)` |
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Answer» Correct Answer - b |
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| 338. |
The Ellingham diagram for a number of metallic sulphides is reproduced below. Answer the questions given below : (i) Formation of which of the sulphidesis not spontaneous ?A. HgSB. `Bi_(2)S_(3)`C. PbSD. `Cs_(2)` |
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Answer» Correct Answer - c |
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| 339. |
The Ellingham diagram for a number of metallic sulphides is reproduced below. Answer the questions given below : (ii) Which occurs to minimum extent in nature ?A. `Ag_(2)S`B. `H_(2)S`C. `Bi_(2)S_(3)`D. `Cs_(2)` |
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Answer» Correct Answer - d |
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| 340. |
The disadvantage of carbon reduction method are :A. high temperature needed which is expensive and requires the use of a blast furnaceB. many metals combine with carbon forming carbidesC. carbon combines with oxygen to form poisonous COD. carbon cannot be used with highly electropositive metals |
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Answer» Correct Answer - a,b |
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| 341. |
The advantage(s) of using carbon to reduce a number of oxides and other compounds are :A. easy availability of cokeB. low cost of carbonC. tendency of carbon to show catenationD. presence of carbon lowers the melting point of the oxides |
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Answer» Correct Answer - a,b |
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| 342. |
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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| 343. |
During the production of iron and steel .A. The oxide ore is primarily reduced to iron by solid coke according to the reaction `2Fe_(2)O_(3) + 3C rarr 4 Fe + 3CO_(2)`B. The oxide ore is reduced by the carbon monoxide according to the reaction `Fe_(2)O_(2) + 3CO rarr 2Fe + 3CO_(2)`C. Major silica impurities are removed as calcium silicate slag by addition of a fluxing agent limestoneD. The silicate slag is used in manufacturing cement |
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Answer» Correct Answer - b,c |
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| 344. |
Point out the wrong statement about the magnetic properties of soft iron and steel.A. 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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| 345. |
Two ores A1 and A2 of a metal M show the following reactivity: `A_(1)=CuCo_(3).Cu(OH)_(3),S=Cu` `P=Cu_(2)I_(2): G=SO_(2)` . Then `A_(2)` isA. `Cu(OH)_(3)`B. `CuO`C. `CuCO_(3)`D. `Cu_(2)S` |
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Answer» Correct Answer - D |
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| 346. |
Roasting of copper pyrites is done:A. to remove moisture and volatiaile impuritiesB.C.D. |
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Answer» Correct Answer - 4 |
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| 347. |
Two ores A1 and A2 of a metal M show the following reactivity: `A_(1)=CuCo_(3).Cu(OH)_(3),S=Cu` `P=Cu_(2)I_(2): G=SO_(2)` . Then `A_(2)` isA. `Cu(OH)_(3)`B. `CuO`C. `CuCO_(3)`D. `Cu_(2)S` |
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Answer» Correct Answer - D |
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| 348. |
Heating mixture of `Cu_(2)O` and `Cu_(2)S` will giveA. `Cu+SO_(2)`B. `Cu+SO_(3)`C. `CuO+CuS`D. `Cu_(2)SO_(3)` |
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Answer» Correct Answer - 1 |
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| 349. |
How many of the following are oxides ores (i) Carnalite (ii) Cuprite (iii) Cassiterite (iv) Chromite (v) Cinnabar (vi) Calamine (vii) Cerussite (Viii) Chalocopyrite (ix) Chalcocite |
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Answer» Correct Answer - 3 |
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| 350. |
Which of the following statement is incorrect ?a)Oxide of aluminium `(Al_(2)O_(3))` and arsenic `(As_(2)O_(3))` are amphoteric.b)Oxide of chlorine `(Cl_(2)O_(7))` is less acidic than oxide of nitrogen `(N_(2)O_(5))`.c)Oxide of carbon `(CO_(2))` is more acidic than oxide of silica `(SiO_(2))`.d)The correct increasing order of basic character of various oxides is `H_(2)O lt CuO lt MgO lt CaO`.A. Calamine and siderite are carbonatesB. Argentite and cuprite are oxidesC. Zinc blende and pyrites are sulphidesD. Malachite and azurite are ores of copper |
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Answer» Correct Answer - B |
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