GATE MT Material and Energy balances in metallurgical processes; Principles and processes for the extraction of non-ferrous metals – aluminium, copper and titanium. PYQs & Answers

Questions 1–10 of 16. Imported answers require independent review unless marked reviewed.

Which one of the following processes is NOT related to the extraction and refining of titanium from ilmenite ore?

Your answerChoose one option.

Pidgen’s process

Sorel process

Van Arkel process

Kroll’s process

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Which one of the following is the correct statement about the industrial production of aluminium from pure dry alumina by Hall-Héroult electrolytic reduction?

Your answerChoose one option.

Cell is operated at a high voltage (220 to 240 V) with a very low current density.

Cell is operated at a low voltage (5 to 7 V) with a very low current density.

Cell is operated at a high voltage (220 to 240 V) with a very high current density.

Cell is operated at a low voltage (5 to 7 V) with a very high current density.

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Which of the following statements is/are correct?

Your answerSelect all correct options. You can choose more than one.

Ultimate analysis of coal involves determination of moisture, volatile matter, fixed carbon and ash.

Reduction of wustite in blast furnace occurs at the lower part of the stack.

Roasting involves reduction of sulfide ores to pure metals.

White metal (impure Cu

S) is produced by oxidizing Fe and S during smelting of Cu-Fe matte.

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100

of sphalerite concentrate containing 60% ZnS is COMPLETELY roasted with stoichiometric amount of pure oxygen. The amount of oxygen required is _____

. (Round off to one decimal place).

Assume that the other components in the concentrate are not reactive.

Given: Atomic weight values (in

) for Zn = 65, S = 32, O = 16.

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Among the following options, a process for liquid-liquid separation is

Your answerChoose one option.

Smelting

Roasting

Sintering

Calcination

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Match the processes in Column I with the corresponding applications in Column II.

Column I (P) Fused salt electrolysis (Q) Carbothermal reduction (R) Oxidation-refining (S) Matte converting

Column II (1) Ironmaking (2) Aluminium extraction (3) Copper extraction (4) Steelmaking

Your answerChoose one option.

P – 2, Q – 1, R – 4, S – 3

P – 4, Q – 3, R – 2, S – 1

P – 3, Q – 1, R – 4, S – 2

P – 2, Q – 4, R – 1, S – 3

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Identify the INCORRECT statement(s)

Your answerSelect all correct options. You can choose more than one.

Calcination is typically exothermic and roasting is usually endothermic.

Coking of coal is carried out in a shaft furnace.

The aims of extractive metallurgy processing are separation, compound formation, metal production, and metal purification.

The secondary steelmaking offers steel cleanliness, composition adjustments, and temperature adjustments.

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Titanium is produced commercially by __________

Your answerChoose one option.

smelt reduction of TiO₂

thermal dissociation of TiH₂

reduction of TiCl₄ by Mg

reduction of TiO₂ by H₂

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Which one of the following is a hydrometallurgical operation?

Your answerChoose one option.

Roasting

Leaching

Zone refining

Smelting

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Match the processes in Column I with the most appropriate mechanisms in Column II.

Column I (P) Blast furnace iron making process (Q) Hall-Heroult's process (R) Basic oxygen furnace steel making process (S) Kroll's process

Column II

Metallothermic reduction

Oxidation

Carbothermic reduction

Fused salt electrolysis

Your answerChoose one option.

P-1, Q-4, R-2, S-3

P-3, Q-1, R-2, S-4

P-3, Q-4, R-2, S-1

P-1, Q-2, R-3, S-4

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GATE MT Material and Energy balances in metallurgical processes; Principles and processes for the extraction of non-ferrous metals – aluminium, copper and titanium. PYQs

How to practice Material and Energy balances in metallurgical processes; Principles and processes for the extraction of non-ferrous metals – aluminium, copper and titanium.

Question 20

Question 21

Question 47

Question 60

Question 16

Question 42

Question 49

Question 13

Question 13

Question 32