Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2003ChemistryGeneral Principles and Processes of Isolation of MetalsActual

The method of zone refining of metals is based on the principle of:

Options

  1. Agreater mobility of the pure metal that than that of the impurity
  2. Bhigher melting point of the impurity than that of the pure metal
  3. Cgreater noble character of the solid metal than that of the impurity
  4. Dgreater solubility of the impurity in the molten state than in the solid

Correct answer

D. greater solubility of the impurity in the molten state than in the solid

Step-by-step solution

The principle of zone refining is that the impurities in ore of metal are more soluble in the melted state when compared to the corresponding solid state of the impurities. In the zone refining process, the impurities are concentrated at one end of the block of metal so that the rest of the block is purified. Related Theory Zone refining process is very effective in the removal of impurities from semiconducting elements such as Germanium, Gallium, and Silicon. This process is also used in refining high-purity metal

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 NEET PYQs