Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202125 Feb 2021Evening ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

The method used for the purification of Indium is:

Options

  1. Avapour phase refining
  2. Bliquation
  3. Czone refining
  4. Dvan Arkel method

Correct answer

C. zone refining

Step-by-step solution

Zone refining is used for the purification of indium. Zone refining is based on the principle that the impurities are more soluble in the melt than in the solid state of the metal. This method is very useful for producing semiconductor and other metals of very high purity, e.g., germanium, silicon, boron, gallium.

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

More from General Principles and Processes of Isolation of Metals

Identify the incorrect pair from the following : 2024The correct statement(s) related to processes involved in the extraction of metals is(are) 2023Which one of the following is not an example of calcination? 2023Given below are two statements related to Ellingham diagram : Statement I : Ellingham diagrams can be constructed for formation of oxides, sulphides and halides of metals. Statemen 2023Which one of the following is most likely a mismatch? 2023Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: In the Ellingham diagram, a sharp change in slope of the line is o 2023Given below are two statements: Statement I: In the metallurgy process,sulphide ore is converted to oxide before reduction. Statement II: Oxide ores in general are easier to reduce 2023In the extraction process of copper, the product obtained after carrying out the reactions (i) 2 Cu 2 S + 3 O 2 ⟶ 2 Cu 2 O + 2 SO 2 (ii) 2 Cu 2 O + Cu 2 S ⟶ 6 Cu + SO 2023 Full General Principles and Processes of Isolation of Metals list All JEE Main PYQs