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Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - NEET MCQ


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25 Questions MCQ Test Chemistry Class 12 - Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT)

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Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 1

Only One Option Correct Type

Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

Q. 

Which one of the following is the major impurity in pig iron?

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 1

It is an impure form of iron cast into blacks (Pigs) obtained from iron over by blast furnace process.
Graphite is the major impurity in pig iron. Pig-iron is later converted into cast iron or steel.

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 2

In smelting the furnace most suitable is

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 2

Blast furnace is most suitable for smelting which is used for the manufacture of cast iron.

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Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 3

Silver from argentiferous lead is obtained by

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 3

Pattinson's Process is the method which is usually adopted for the desilverising lead. 

Cupellation is a process where ores are treated under high temperatures and controlled operations to separate noble metals like gold and silver, from base metals like led, copper, zinc, and others present in the ore or alloyed metal. 

The Parke's process is a process for removing silver from lead, during the production of bullion. It is an example of liquid-liquid extraction. 

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 4

Which of the following has lowest carbon content?

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 4

Wrought iron is an iron with a very low carbon (less than 0.08%) content in contrast to cast iron (2.1 to 4%). Stainless steel contain maximum of 0.15 % carbon. Chrome steel contains high carbon content.

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 5

During the process of electrolytic refining of copper, some metals present as impurity settle as anode mud. These are

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 5

The impurities of more electropositive metais remain as ions in the bath whereas impurities of less electropositive metals (Ag and Au) remain unionised and settle down under the anode as anode mud or anode sludge.

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 6

2CuCO3 . Cu(OH)2 is the formula of

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 6

Azurite is an copper Ore [2CuCO3​⋅Cu(OH)2​]

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 7

The temperature of the slag zone in the metallurgy of iron using blast furnace is

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 7

Slag zone is the zone of blast furnace where flux and gangue mix to form slag.

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 8

The Puddler’s candles are produced due to the burning of

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 8

In the conversion of cast iron into wrought iron, the carbon impurities present as Fe3C are oxidised and escapes as carbon monoxide.

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 9

In the extraction of copper, the metal formed in the Bessemers convertor is due to the reaction

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 9

Cuprous sulphide (Cu2S) and cuprous oxide (Cu2O) react with each other to form copper metal along with evolution of SO2 gas.

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 10

Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 10

Ag2S + 4NaCN + 2O2 →2Na[Ag(CN)2] + Na2SO4

*Multiple options can be correct
Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 11

One or More than One Options Correct Type

Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Q. 

Which one of the following reactions, take place during the extraction of iron?

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 11

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 12

Annealing improves

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 12

The correct answer is option D.

Annealing is a heat treatment process which alters the microstructure of a material to change its mechanical and electrical properties. Typically, in steels, annealing is used to reduce hardness, increase ductility and help eliminate internal stresses. With continued time at the annealing temperature, some of the newly formed grains grow at the expense of neighboring grains.  There is some further decrease in strength and increase in ductility as the average grain size increases during the grain growth phase of the annealing process.

*Multiple options can be correct
Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 13

The statements that are correct among the given are

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 13

Collectors enhance the non-wettability of the ore particles and froth stabilises (e.g. cresols and aniline.)

*Multiple options can be correct
Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 14

Which of the following process is not based on the formation of complex compounds ?

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 14

Poling is employed when the crude metal contains impurities of the oxide of metal itself.

*Multiple options can be correct
Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 15

Which of the following are white in colour?

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 15

CuSO4 . 5H2O is blue vitriol.

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 16

Comprehension Type

Direction (Q. Nos. 16-17) This section contains a paragraph, describing theory, experiments, data, etc.
Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

Passage

Steel is the most important commercial variety of iron. The % of carbon in this form of iron is midway between that of cast iron and wrought iron i.e. 0.25 to 2 %.
There are many varieties of steel depending on the amount of carbon present in it such as mildj^teels, hard steels and special steels. Steel mixed with small amount of Ni, Co, Cr, W, Mo, Mn etc., acquire special properties. Such products are called alloy steels.

Q. 

Which of the following is used to make permanent magnets?

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 16

Alnico is Fe, Al, Ni, Co.

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 17

Passage

Steel is the most important commercial variety of iron. The % of carbon in this form of iron is midway between that of cast iron and wrought iron i.e. 0.25 to 2 %.
There are many varieties of steel depending on the amount of carbon present in it such as mild steels, hard steels and special steels. Steel mixed with small amount of Ni, Co, Cr, W, Mo, Mn etc., acquire special properties. Such products are called alloy steels.

Q. 

Steel used in making pendulums, measuring tapes

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 17

Invar steel is Fe and Ni.

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 18

Matching List Type

Direction (Q. No. 18 and 19) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

Q. 

Match the Column I with Column II and mark the correct option code.

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 18

(i) → (q), (ii) → (p), (iii) → (s), (iv) → (p)

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 19

Match the Column I with Column II and mark the correct option code.

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 19

(i) → (r,s), (ii) → (p), (iii) → (r), (iv) → (t)

*Answer can only contain numeric values
Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 20

One Integer Value Correct Type

Direction (Q. Nos. 20-24) This section contains 5 questions. When worked out will result is an integer from 0 to 9 (both inclusive).

Q. 

The percentage of copper in duralumin is


Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 20

Duralumin is an alloy having Al (95%), Cu(4%) and Mg (1%).

*Answer can only contain numeric values
Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 21

The percentage of silver in German silver is


Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 21

German silver is the alloy of CU+ Zn + Ni.

*Answer can only contain numeric values
Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 22

Mohr’s salt is a double salt with the formula FeSO4(NH4)2SO4xH2O. Here, value of x is


Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 22

Mohr’s salt formula FeSO4(NH4)2SO4 . 6H2O.

*Answer can only contain numeric values
Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 23

Number of unpaired electrons in the complex [Ag(CN)2]- are


Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 23

[Ag(CN)2]- complex having configuration of central atom (Ag) as [Kr]4d10 have zero unpaired electron.

*Answer can only contain numeric values
Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 24

The number of silver containing compounds among Nessler’s reagent, Tollen’s reagent, Baeyer’s reagent, Corrosive sublimate, Horn silver, Ruby silver, Calomel.


Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 24

Nessler’s reagent (K2[HgI4]), Tollen's reagent [Ag(NH3)2]+ , Baeyer's reagent AIk. KMnO4, Corrosive sublimate (HgCI2), Horn silver (AgCI), Ruby silver (3Ag2SSb2S3), Calomel (Hg2CI2).

Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 25

Statement Type

Direction (Q. No. 25) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

Q. 

Statement I : Silver is obtained from its cyanide complex during leaching.

Statement II : Copper can be extracted by poling process when it contain Cu2O as impurities.

Detailed Solution for Test: Metallurgy of Some Important Metals (Cu, Fe & Ag) (Old NCERT) - Question 25

Statement II does not explains the statement correctly.

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