Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEST2011ChemistryGeneral Principles and Processes of Isolation of Metals

Aluminium and copper are two important metals required on a large scale. Aluminium is extracted from its oxide ore bauxite through separation of alumina (Bayer process) followed by electrolysis of alumina. Copper is extracted from its sulphide ore copper pyrites. The concentrated ore is heated in a reverberatory furnace with silica and the copper matte obtained is heated in a Bessemer furnace with a blast of air to o

Options

  1. ACopper is formed due to autoreduction of copper oxide and copper sulphide.
  2. BAluminium is difficult to obtain by chemical reduction due to its strong electropositive nature and high affin
  3. CIn the Bayer process sodium carbonate can replace sodium hydroxide.
  4. DCopper can be extracted from a copper oxide ore by heating with coke.

Correct answer

D. Copper can be extracted from a copper oxide ore by heating with coke.

Step-by-step solution

No solution available.

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 NEST PYQs