Metallurgy - NEET BOOSTER...The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag

Chemistry

Metallurgy

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Which is not iron ore

(A) Haematite

(B) Siderite

(C) Dolomite

(D) Limonite.

01


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The cryolite is used in the electrolytic extraction

of aluminium

(A) To oxidise bauxite

(B) To get more aluminium

(C) To protect anode

(D) To reduce the m.p. of Alumina

02


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Monds process is used for

(A) Ni

(B) Al

(C) Fe

(D) Cu.

03


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Stainless steel is an alloy of

(A) Copper

(B) Nickel & chromium

(C) Manganese

(D) Zinc.

04


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In the removal of silica during smelting, the flux

used is

(A) Ferric oxide

(B) Calcium oxide

(C) Cupric oxide

(D) Phosphorus pentoxide

05


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Lead metal is purified by

(A) Poling

(B) Liquation

(C) Electromagnetic separation

(D) Smelting.

06


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Which of the following elements is present as the

impurity to the maximum extent in the pig iron?

(A) Phosphorus

(B) Manganese

(C) Carbon

(D) Silicon.

07


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The following reactions take place in the blast furnace

in the preparation of impure iron. Identify the reaction

pertaining to the formation of the slag

(A) 2C(s) + O2(g) 2CO (g)

(B) Fe2O3(s) + 3CO (g) 2Fe(l) + 3CO2(g)

(C) CaCO3(s) CaO(s) + CO2 (g)

(D) CaO(s) + SiO2(s) CaSiO3(s).

08


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Sodium is extracted from

(A) Aqueous sodium chloride

(B) Molten sodium chloride

(C) NaOH

(D) NaNO3

09

Match List-I (substances) with List-II (processes employed in the

manufacture of the substances and select the correct option

List-I List-II

Substances Processes

(a) Sulphuric acid (i) Haber's Process

(b) Steel (ii) Bessemer's Process

(c) Sodium hydroxide (iii) Leblanc Process

(d) Ammonia (iv) Contact Process

Options :

(A) (a)-(i), (b)-(ii), (c)-(iii), (d)-(v) (B) (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

(C) (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i) (D) (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)

10


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Aluminium is extracted by the electrolysis of

(A) Bauxite

(B) Alumina

(C) Alumina mixed with molten cryolite

(D) Molten cryolite.

11


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Calcium is obtained by

(A) Roasting of lime stone

(B) Electrolysis of calcium chloride in H2O

(C) Electrolysis of molten anhydrous calcium

chloride

(D) Reduction of calcium chloride with carbon.

12


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The carbonate ore of iron and sulphide ore of

copper are respectively

(A) Limonite and malachite

(B) Siderite and chalcopyrite

(C) Haematite and chalcocite

(D) Magnetite and azurite.

13


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Gypsum is represented as

(A) CaSO4. H2O

(B) CaSO4.2H2O

(C) 2CaSO4.2H2O

(D) CaSO4. 1/2 H2O

14


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Lime stone is

(A) CaO

(B) Ca(OH)2

(C) Both of the above

(D) None of the above.

15


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Which of the following sulphides when heated

strongly in air gives the corresponding metal ?

(A) HgS

(B) CuS

(C) Fe2S3

(D) FeS.

16


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Which of the following is not a mineral of iron ?

(A) Magnetite

(B) Siderite

(C) Smithsonite

(D) Limonite.

17


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Which of the following is not an ore of

magnesium ?

(A) Carnallite

(B) Dolomite

(C) Calamine

(D) Sea water.

18


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The molecular formula of Ruby silver is

(A) Ag2S

(B) AgCl

(C) Ag2CO3

(D) Ag2S.Sb2S3

19


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Which of the following statements, about the advantage of

roasting of sulphide ore before reduction is not true ?

(A) Roasting of the sulphide to the oxide is thermodynamically

feasible

(B) Carbon and hydrogen are suitable reducing agents for metal

sulphides

(C) The DfGº of the sulphide is greater than those for CS2 and

H2S

(D) The DfGº is negative for roasting of sulphide ore to oxide

20


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Sulphide ores of metals are usually concentrated

by froth floatation process. Which one of the

following sulphide ores offers an exception and is

concentrated by chemical leaching ?

(A) Sphalerite (B) Argentite

(C) Galena (D) Copper pyrites.

21


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The method of zone refining of metals is based on the principle

of

(A) Greater mobility of the pure metal than that of the

impurity

(B) Higher melting point of the impurity than that of the

pure metal

(C) Greater noble character of the solid metal than that of

the impurity

(D) Greater solubility of the impurity in the molten state

than in the solid.

22


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Pyrolusite is a /an

(A) Oxide ore

(B) Sulphide ore

(C) Carbide ore

(D) Not an ore

23


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Use of electrolysis is

(A) Electroplating

(B) Electrorefining

(C) Both (A) and (B)

(D) None of these.

24


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In the extraction of silver, Ag2S is dissolved in

(A) HCl

(B) HNO3

(C) KCN

(D) H2SO4 .

25


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Percentage of silver in German silver is

(A) 0 %

(B) 1 %

(C) 5 %

(D) None of these.

26


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Desilverisation of lead is done by

(A) Parke process

(B) Cyanamide process

(C) Cupellation

(D) Poling.

27


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Sodium is made by the electrolysis of a molten

mixture of about 40% NaCl and 60% CaCl2 because

(A) CaCl2 helps in conduction of electricity

(B) This mixture has a lower melting point than NaCl

(C) Ca++ can displace Na from NaCl

(D) Ca++ can reduce NaCl to Na.

28


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Cryolite is used in the extraction of

(A) Ag

(B) Al

(C) Cr

(D) Cu.

29


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Malachite is

(A) Al2O3.H2O

(B) Cu(OH)CuCO3

(C) Cu(OH)2. CuCO3

(D) FeCO3

30


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In blast furnace, maximum temperature is in

(A) Zone of fusion

(B) Zone of combustion

(C) Zone of slag combustion

(D) Zone of reduction.

31


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Copper and tin are constituent of

(A) Bronze

(B) German silver

(C) Brass

(D) None.

32


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Which process of purification is represented by

the following scheme ?

Ti(impure) + 2I2 TiI4 Ti (pure) + I2

(A) Poling (B) Electrolytic refining

(C) Zone refining (D) Van-Arkel process.

33

Cº250

Cº1400

Match list I with list II and select the correct answer using the

codes give below the lists

List I : Type of ore List II : Example

A. Oxide ore a. Feldspar

B. Sulphide ore b. Barytes

C. Sulphate ore c. Fluorspar

D. Halide ore d. Galena

e. Corundum

Codes :

(A) A – a, B – e, C–b, D–c (B) A – b, B – d, C–c, D–a

(C) A – b, B – d, C–c, D–a (D) A – e, B – b, C–b, D–c

34


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Cryolite is the ore of

(A) Al

(B) Cu

(C) Ag

(D) Fe.

35


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Cyanide process is used in the

(A) Metallurgy of iron

(B) Metallurgy of silver

(C) Metallurgy of copper

(D) Metallurgy of aluminium.

36


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From the solution of copper sulphate, copper can

be displaced by which one of the following metal

(A) Fe

(B) Au

(C) Pt

(D) Ag.

37


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Which of the following is used in electro plating

(A) AgCl

(B) AgNO3

(C) Sodium argentocyanide

(D) None.

38


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In which of the following isolations no reducing

agent is required

(A) Iron from haematite

(B) Aluminium from bauxite

(C) Mercury from cinnabar

(D) Zinc from zinc blende.

39


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Galvanization include iron with

(A) Zinc

(B) Tin

(C) Copper

(D) Aluminium.

40


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Metallurgy - NEET BOOSTER...The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag