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 chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Metals generally extracted by electrolysis of their fused salts are highly:

  1. electropositive

  2. electronegative

  3. depends on temperature

  4. depends on impurities in the metal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Highly electropositive metals (like alkali and alkaline earth metals) have very negative standard reduction potentials, making them difficult to reduce by chemical means. Electrolysis of their fused salts is the standard industrial method for their extraction.

Multiple choice chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Molten silver absorbs _________ which is given off on cooling causing violent spurting. This is called splitting of silver and can be prevented by covering the molten metal with a layer of charcoal.

  1. carbon monooxide

  2. carbon dioxide

  3. carbon

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

Molten silver absorbs oxygen which is given off on cooling causing violent spurting. This is called splitting of silver and can be prevented by covering the molten metal with a layer of charcoal.

Multiple choice chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

The percent of silver in silver - copper alloy used for jewellery purposes has _______ % silver.

  1. 20

  2. 40

  3. 60

  4. 80
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The percent of silver in silver - copper alloy used for jewellery purposes has 80 % silver and 20% copper. Silver copper alloy is used in coins, ornaments, silver ware, decoration pieces, etc.

Multiple choice chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Classify the following as physical or chemical properties.
The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements.

  1. Physical property

  2. Chemical property
  3. Both $A$ and $B$
  4. Neither $A$ or $B$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Steel is an alloy of various metals, physically combined together in a fixed amount by weight, to improve the physical and mechanical properties.

Multiple choice chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Which of the following is/are true about silver plating?

  1. The process of depositing a thin layer of silver electrolytically on metal surface is called silver plating.

  2. The article to be silver plated is made the anode

  3. Cathode consists of pure silver.
  4. The bath contains a solution of potassium argentocyanide $(AgNO _3+ \text { excess of KCN})$
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation

The following are true about silver plating.
The process of depositing a thin layer of silver electrolytically on metal surface is called silver plating.
The article to be silver plated is made the cathode.
Anode consists of pure silver.
The bath contains a solution of potassium argentocyanide $(AgNO _3+ \text { excess of KCN})$

Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

Nitriding is a process of heating steel in atmosphere of:

  1. $NH _{3}$
  2. $N _{2}$

  3. oxygen

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

Nitrating is a process of heating high carbon steels, aluminium, molybdenum etc in atmosphere of $NH _3$. Because of nitrating a case hardened surface of $N _2$ is formed on metal surface which comes from Ammonia.

Multiple choice

The Iron Man suit is made of a gold titanium alloy. How is an alloy made?

  1. Melting together 1+ metal with 1+ element

  2. Freezing 2 or more metals together

  3. A mixture of at least 3 elements

  4. Melting together 1 gas with at least 1 liquid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An alloy is a metallic substance composed of two or more elements, at least one of which is a metal, usually created by melting them together.

Multiple choice

When oxidation occurs, it forms...

  1. Oxigen

  2. Mold

  3. Rust

  4. Ferric
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxidation of iron in the presence of oxygen and moisture forms rust, which is hydrated iron(III) oxide. Mold is a biological organism, oxygen is a reactant rather than a product, and ferric refers to an oxidation state of iron rather than a compound.

Multiple choice

the science of working with metals

  1. ironology

  2. plumber

  3. <span style="font-size: 11px;">steel worker

  4. metallurgy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Metallurgy is the scientific study and technology of extracting, refining, and working with metals. Ancient Indians were highly skilled in this field, famously creating the rust-resistant Iron Pillar of Delhi.

Multiple choice

Why are alloys better than pure metals?

  1. Because alloys are stronger and easier to work with.

  2. No one knows why.

  3. Because better metalworkers worked with alloys.

  4. Because of their chemical composition.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alloys are created by mixing metals to combine their desirable properties. This process typically results in a material that is stronger, more durable, or more resistant to corrosion than the pure base metals.

Multiple choice

What type of change is iron turning to rust?

  1. Chemical

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

Rusting is a chemical process where iron reacts with oxygen to form a new substance, iron oxide. This is a permanent change in the chemical composition of the material.

Multiple choice

A metal that is able to be drawn (made) into wire.

  1. Ductile

  2. Conductive

  3. Corrosive

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

Ductility is the physical property of a metal that allows it to be stretched into a thin wire. Conductivity refers to the ability to transmit heat or electricity.

Multiple choice

What makes bronze better than copper

  1. it was stronger

  2. it was easier to find

  3. it was worth more

  4. it more affordable
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bronze is an alloy of copper and tin, which makes it significantly harder and more durable than pure copper.