Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
KCET2011ChemistryGeneral Principles and Processes of Isolation of Metals

In chromite ore, the oxidation number of iron and chromium are respectively

Options

  1. A+3 , +2
  2. B+3,+6
  3. C+2,+6
  4. D+2,+3

Correct answer

D. +2,+3

Step-by-step solution

Chromite ore is FeCr ₂ O ₄ , ie, FeO , Cr ₂ O ₃ O.N. of Fe =+2 ; O.N. of Cr =+3 .

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

More from General Principles and Processes of Isolation of Metals

The metal purified by Mond process is X. The number of unpaired electrons in X is 2025Which of the following are carbonate ores ? I. Siderite II. Kaolinite III. Calamine IV. Sphalerite 2025Which of the following methods is useful for producing semiconductor grade metals of high purity ? 2025Match the following List-I (Process) List-II (Metal) A) Hall-Heroult process I) Ti B) Mond process II) In C) van-Arkel process III) Al D) Zone refining process IV) Ni The correct a 2025Consider the following: Statement-I : In the extraction of Al by Hall-Heroult process, pure Al ₂ O ₃ mixed with Na ₃ ~AlF ₆ lowers its melting point and increases conductivity. Sta 2025Which of the following reactions is an example of roasting ? 2025In the extraction of iron from haematite, the impurity (x) of the ore is removed in the form of ' y ', what are x and y respectively? 2025Which of the following is used as froth stabilizer in froth floatation process? 2025 Full General Principles and Processes of Isolation of Metals list All KCET PYQs