Principles Of Metallurgy (VSAQs)

Physical Science | 11. Principles Of Metallurgy – VSAQs:
Welcome to VSAQs in Chapter 11: Principles Of Metallurgy. This page contains the most important VSAQs in this chapter. Aim to secure top marks in your exams by understanding these clear and straightforward Very Short Answer Questions.

VSAQ-1 : What would happen, if the metals like copper and iron do not get oxidized? Guess and write.

Consequence of Non-Oxidation:

  1. Challenge in Detection: Without oxidation, identifying copper and iron ions in experiments would become challenging.
  2. Impact on Applications: Various applications and analyses that depend on redox reactions involving these metals would be significantly affected.

VSAQ-2 : What are the essential conditions that iron articles get rust?

Essential Conditions for Rusting of Iron Articles

  1. Presence of Water: Moisture or water is crucial for the rusting process.
  2. Oxygen from Air: Oxygen in the air reacts with iron in the presence of water to form rust.

VSAQ-3 : What are the preventive methods do you take for rusting of iron materials?

Preventive Measures for Rusting of Iron Materials

  1. Painting:
    • Objective: Create a barrier between the metal and the environment.
    • Method: Apply protective paint or coating on the iron surface to prevent exposure to moisture and oxygen.
  2. Electroplating:
    • Objective: Add a layer of protection to the iron.
    • Method: Coat iron materials with non-rusting metals like tin or zinc through electroplating to inhibit rust.
  3. Oiling and Greasing:
    • Objective: Protect the iron surface from environmental elements.
    • Method: Regular application of oils or greases to form a protective film, blocking moisture and oxygen contact.

VSAQ-4 : List three metals that are found in nature in uncombined form.

Metals Found in Nature in Uncombined Form

  1. Gold (Au): Naturally occurs in its pure, elemental state.
  2. Silver (Ag): Found in native form, not combined with other elements.
  3. Copper (Cu): Exists in nature as a free metal.

VSAQ-5 : What is activity series? How it helps in extraction of metals?

What is Activity Series?

  1. Definition: The activity series is a list of metals arranged according to their reactivity, from most reactive to least reactive.
  2. Function: It indicates how readily each metal can undergo oxidation (lose electrons).

Role in Metal Extraction

  1. Guide for Extraction Methods: The series helps determine the most effective extraction method for a metal, based on its position in the series.
  2. Reactivity Consideration: Metals higher in the series are more reactive and can displace less reactive metals from their compounds.
  3. Selection of Reducing Agents: The reactivity of a metal guides the choice of reducing agents in processes like smelting or chemical reduction.

VSAQ-6 : What are minerals?

  1. Naturally Occurring: Minerals are substances that occur naturally in the Earth’s crust.
  2. Inorganic Origin: They are inorganic, meaning they are not formed by living organisms.
  3. Composition: Minerals can be single elements or compounds.
  4. Structure: They often possess a distinct crystalline structure.
  5. Example: Iron (Fe) is an example of a mineral that is a metal found in various forms in the Earth’s crust.

VSAQ-7 : What is refining of metal?

Refining of Metal

  1. Process Description: Refining of metal is the process of purifying an impure metal.
  2. Objective: Aimed at obtaining a pure and high-quality metal with minimal impurities.
  3. Techniques Used: Various techniques are employed, such as electrolysis, fractional crystallization, or chemical processes.
  4. Purpose: The goal is to remove unwanted substances and achieve the desired purity level for the final metal product.