Chemistry · Science General

Metallurgical Processes

1,403 Questions

This section explores key metallurgical processes including ore concentration, pyrometallurgy, and metal refining. It also covers corrosion and the properties of refractory materials. These chemistry questions are relevant for engineering and science entrance tests.

Pyrometallurgy furnacesMetal refining techniquesCorrosion protection methodsOre concentrationAuto reduction process

Metallurgical Processes Questions

Multiple choice

Metals are ductile.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ductility is the ability of a material to be stretched into a wire, which is a defining physical property of metals.

Multiple choice

Which of these best describes bronze?

  1. An alloy of copper and iron

  2. Softer than copper, so could easily be welded

  3. Caused iron tools to fade into obscurity

  4. Transformed human societies through better tools and weapons
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bronze, an alloy of copper and tin, was harder and more durable than copper, allowing for the creation of superior tools and weapons that transformed agricultural and military capabilities.

Multiple choice

What is metallurgy?

  1. The study of metal

  2. The process of creating alloys

  3. The knowledge of working with metal

  4. The earliest known bronze casting technique
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Metallurgy is defined as the branch of science and technology concerned with the properties of metals and their production and purification, essentially the knowledge of working with metal.

Multiple choice

Tin cans, used for storing food, are made by electroplating tin onto iron. Why?

  1. Tin gives a shiny appearance

  2. To make the vessel cheap

  3. Tin is less reactive than iron

  4. To make the vessel lighter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tin is less reactive than iron, meaning it does not rust or corrode as easily when exposed to food acids. Electroplating iron with tin protects the iron from coming into contact with the food.

Multiple choice

The chemical name for rust is ....

  1. Carbon Monoxide

  2. Iron Oxide

  3. Carbon Dioxide

  4. Water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rust is the common name for iron oxide, which forms when iron reacts with oxygen in the presence of water or moisture.

Multiple choice

Malleability and ductility of metals can be accounted due to 

  1. The presence of electrostatics force

  2. The crystalline structure in matter

  3. The capacity of layers of metal ions to slide over the other
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Metallic bonding allows layers of metal ions to slide over each other without breaking the bonds, which is why metals are malleable and ductile.

Multiple choice some important compounds of magnesium and calcium the s-block elements chemistry

Reactants of superphosphate are mixed in a ____________ chamber with a mechanical stirrer and two valves at the bottom. 

  1. cast iron

  2. stainless steel

  3. mild stainless steel

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

A well powdered phosphate rock or bone ash mixed known quantity of concentrate sulphuric acid is introduced into a cast iron chamber provided with mechanical stirrer and two valves at bottom. Each valve opens in a big chamber called den. The mixture is stirred for 2 to 5 minutes and then  dumped mechanically into one of the dens through the valve. The mass is kept in the den for about 24 hours.

Multiple choice some important compounds of magnesium and calcium the s-block elements chemistry

$ MgCl _2 \cdot 6H _2O$ is obtained from carnalite. Which of the following is true?

  1. $ MgCl _2 \cdot 6H _2O$ is left behind in the fused mass
  2. $ MgCl _2 \cdot 6H _2O$ solidifies when fused mass is cooled to 176 deg C
  3. $KCl$ remains in the fused state
  4. Solvent extraction is used to extract $KCl$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carnalite ($ KCl \cdot MgCl _2 \cdot 6H _2O$) is fused and cooled to 176 deg C.  Potassium content solidifies and $ MgCl _2 \cdot 6H _2O$ remains infused state. Fused mass is separated from deposited $KCl$ and is allowed to cool. The remaining $KCl$ is separated by deposition of carnalite crystals, which crystallizes out first.
$ MgCl _2 \cdot 6H _2O$ is left behind in the fused mass.

Multiple choice some important compounds of magnesium and calcium the s-block elements chemistry

Which of the following(s) is/are correct for magnesium and zinc?

  1. $MgO$ and $ZnO$ are amphoteric
  2. $MgCO _3$ and $ZnCO _3 $ both on heating give corresponding oxides

  3. Both are used as electrodes

  4. Both are used to prevent corrosion
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
Explanation
Option $(B)\ ,(C),\ (D)$ are correct. They all are facts.
$MgO$ is basic while $ZnO$ is amphoteric in nature.