Chemistry · Science General

Metallurgical Processes

1,436 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

When impurities are present in minerals, the term used is _______.

  1. ore

  2. gangue

  3. oxides

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

Gangue refers to the commercially valueless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. Ore is the mineral itself, while oxides and agents are chemical categories or roles, not terms for impurities.

Multiple choice

The rusting of iron is an example of

  1. absorption

  2. adsorption

  3. oxidation

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

The rusting of iron is a chemical process where iron reacts with oxygen in the presence of water to form iron oxide, which is an oxidation reaction.

Multiple choice

Among the following ----------------- is used as a corrosion resistant agent.

  1. Zinc chloride

  2. Zinc chromate

  3. Zinc cyanide

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

Zinc chromate, ZnCrO4, is a chemical compound containing the chromate anion, appearing as odourless yellow solid powder. It is used industrially in chromate conversion coatings. Exposure to zinc chromate can cause tissue ulceration and cancer. Its use as a corrosion resistant agent was applied to aluminium alloy parts first in commercial aircraft, and then in military ones.

Multiple choice

Rusting of iron represents

  1. phenomena of oxidation

  2. phenomena of galvanization

  3. change in physical state

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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Multiple choice

Which of the following correctly defines ‘ductility’?

  1. The ability of elements to be hammered into thin sheets.

  2. The ability of elements to be drawn into wires.

  3. The ability of elements to produce sound when struck.

  4. The ability of elements to conduct current.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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Multiple choice

Matrix is defined as

  1. unwanted foreign material present in the ore

  2. flux added to remove the unwanted impurities from ore

  3. slag formed as a result of the reaction of flux with gangue

  4. material used in the reduction of metal oxide to metal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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