Tag: metallurgy

Quizzes (24) Questions (88)

Questions Related to metallurgy

Multiple choice thermodynamic principles of metallurgy general principles and processes of isolation of elements metallurgy chemistry

(a) Thermite welding process exploits the difference in reactivity of different metals.
(b) Zinc spelter is used as cathode in electrolyte refining process of zinc.
(c) Iron is generally refined by electrolytic reduction process
(d) Iron is alloyed with other metals and carbon, only to prevent corrosion.
Which of the following options regarding the above statements is correct?

  1. a and d

  2. b and c

  3. only a

  4. a, b and c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Thermite welding process exploits the difference in reactivity of different metals. Pure zinc rod is used as cathode while a block of impure zinc spelter is used as anode. Iron is generally refined by smelting process.Iron is alloyed with other metals and carbon prevents the oxidation of iron and formation of rust.

Multiple choice thermodynamic principles of metallurgy general principles and processes of isolation of elements metallurgy chemistry

Which of the following processes involves the smelting process?

  1. $ZnCO _3 \rightarrow ZnO + CO _2$
  2. $2PbS +3O _2 \rightarrow 2PbO + 2SO _2$
  3. $Fe _2O _3 + 3C \rightarrow 2Fe + 3CO$
  4. $Al _2O _3.2H _2O \rightarrow Al _2O _3 + 2H _2O$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In smelting, Iron ore is reduced to iron.

$Fe _{2}O _{3}+3C{\rightarrow}Fe+3CO$

Multiple choice thermodynamic principles of metallurgy general principles and processes of isolation of elements metallurgy chemistry

Which of the following methods is not involved in metallurgy of iron?

  1. Calcination

  2. Smelting

  3. Concentration of ore

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
(1) Calcination is the process in which the ore is heated below its melting point, either in the absence or in a limited supply of air, in an aim to drive off volatile expunges, moisture, water of hydrates and organic matter from the ore. All ores are minerals but all minerals are not ores.

(2)Smelting is a process when a metal which is more reactive than copper needs to be extracted. For example, zinc is more reactive than copper so it has to be extracted by smelting.

(3)Ores are solid material from which a pure metal can be obtained. The process of removal of unwanted material from the ore is known as concentration or dressing or benefaction of ores.

So Calcination, Smelting, Concentration of ore all the processes used in metallurgy.
Multiple choice thermodynamic principles of metallurgy general principles and processes of isolation of elements metallurgy chemistry

Iron is an essential nutrient for plants, which absorb it from the soil. Iron deficiency is often found in wet, clayey soils that have a high content of:

  1. carbonate

  2. chloride

  3. phosphate

  4. sulphate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Iron and carbon occurs combinedly. Iron ore contains carbon percentage more. In clay, wet soils carbon content is more. So, Iron deficiency is there. In reactions carbon changes to carbonate.

Multiple choice thermodynamic principles of metallurgy general principles and processes of isolation of elements metallurgy chemistry

Iron is used in different forms, like, cast iron, steel, and alloys. The iron-carbon diagram is the basis for the branch of science known as:

  1. ferrous metallurgy

  2. stereochemistry

  3. carbon metallurgy

  4. organic chemistry
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The percentage of Iron and Carbon determine whether it is cast Iron, Pig Iron, Steel or Alloys. Hence this is known as Ferrous Metallurgy. The main contribution is given by Iron as every type of Iron contains more than 90% of Iron.