Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

The heating rods of iron embedded in charcoal powder are used to make railway wagon axles. The process is known as

Options

  1. ACase hardening
  2. BSheradizing
  3. CAnnealing
  4. DTempering

Correct answer

A. Case hardening

Step-by-step solution

Case hardening : The process of hardening the surface of wrought iron by depositing a surface layer of steel on it is called case-hardening it is done by heating wrought iron in contact with potassium ferrocyanide. Alternatively, case hardening can also be done by heating wrought iron with charcoal and then plunging it a suitable oil.

Practice General Principles and Processes of Isolation of Metals on Quantrex Academy →

More from General Principles and Processes of Isolation of Metals

The reaction that does NOT takes place in blast furnace between 900K and 1500K temperature range during the extraction of iron is: 2023Read the following statements and choose the set of correct statements: (A) Chrome steel is used for cutting tools and crushing machines. (B) The fine dust of aluminium is used in 2023Match List-I with List-II. List-I (Ores) List-II (Composition) (a) Haematite (i) Fe 3 O 4 (b) Magnetite (ii) ZnCO 3 (c) Calamine (iii) Fe 2 O 3 (d) Kaolinite (iv) Al 2 ( OH ) 4 Si 2022Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature? 2021The maximum temperature that can be achieved in blast furnace is: 2021Identify the correct statement from the following: 2020Match the elements in Column I with methods of purification in Column II. Column-I Column-II (a) Boron (p) Van Arkel method (b) Tin (q) Mond's process (c) Zirconium (r) Liquati 2020Assertion : ZrI ₄ is useful in purification of zirconium (Zr). Reason : ZrI ₄ sublimise at room temperature. 2019 Full General Principles and Processes of Isolation of Metals list All NTA Abhyas NEET PYQs