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Questions and Answers
What is the purpose of adding freshly precipitated aluminium hydroxide to the filtrate?
What is the purpose of adding freshly precipitated aluminium hydroxide to the filtrate?
- To remove impurities from the filtrate (correct)
- To reduce the pH of the filtrate
- To increase the concentration of the filtrate
- To facilitate the precipitation of aluminium hydroxide
Which process involves the reaction between an oxide and aluminium powder to produce a metal?
Which process involves the reaction between an oxide and aluminium powder to produce a metal?
- Electrolytic reduction process
- Hydrometallurgical process
- Aluminothermic process (correct)
- Self-reduction process
What is the purpose of smelting in the extraction of metals?
What is the purpose of smelting in the extraction of metals?
- To reduce the metal oxide to its elemental form
- To separate the metal from its ore (correct)
- To convert the ore into a more reactive form
- To purify the metal
What is the distinguishing feature of the self-reduction process?
What is the distinguishing feature of the self-reduction process?
Which process is used to extract metals such as chromium and manganese on a commercial scale?
Which process is used to extract metals such as chromium and manganese on a commercial scale?
What is the primary purpose of the electrolytic refining process?
What is the primary purpose of the electrolytic refining process?
Which of the following statements is TRUE about the reverberatory furnace?
Which of the following statements is TRUE about the reverberatory furnace?
What is the reaction at the anode during the extraction of sodium?
What is the reaction at the anode during the extraction of sodium?
What is the primary difference between calcination and roasting?
What is the primary difference between calcination and roasting?
What is the process of extracting metals like gold and silver from their native ores?
What is the process of extracting metals like gold and silver from their native ores?
What is the primary purpose of leaching in metallurgy?
What is the primary purpose of leaching in metallurgy?
What is the primary difference between smelting and refining?
What is the primary difference between smelting and refining?
What is the reaction of tin oxide with carbon?
What is the reaction of tin oxide with carbon?
What is the purpose of refining metals?
What is the purpose of refining metals?
What is the method of extraction used for metals like cadmium, copper, and silver?
What is the method of extraction used for metals like cadmium, copper, and silver?
What is the primary purpose of cupellation?
What is the primary purpose of cupellation?
What is the final product obtained through Mond's process?
What is the final product obtained through Mond's process?
Which of the following metals are refined using the Van Arkel process?
Which of the following metals are refined using the Van Arkel process?
What is the principle behind zone refining or fractional crystallisation?
What is the principle behind zone refining or fractional crystallisation?
What is the result of heating impure silver in a blast of air using cupellation?
What is the result of heating impure silver in a blast of air using cupellation?
Which method of refining involves the decomposition of a compound into a pure metal?
Which method of refining involves the decomposition of a compound into a pure metal?
What is the primary method of refining easily fusible metals like lead and tin?
What is the primary method of refining easily fusible metals like lead and tin?
Which of the following metals can be purified by distillation?
Which of the following metals can be purified by distillation?
What is the purpose of fractional distillation in the metallurgy of zinc?
What is the purpose of fractional distillation in the metallurgy of zinc?
Which of the following methods of refining involves the formation of a compound, which is then decomposed into a pure metal?
Which of the following methods of refining involves the formation of a compound, which is then decomposed into a pure metal?
What is the primary purpose of concentration or dressing of the ore?
What is the primary purpose of concentration or dressing of the ore?
Which type of ores are very few in nature?
Which type of ores are very few in nature?
What is the name of the process that separates ore particles based on the difference in specific gravity?
What is the name of the process that separates ore particles based on the difference in specific gravity?
What is the name of the table used in the gravity separation process?
What is the name of the table used in the gravity separation process?
What is the term used to describe the large amount of unwanted impurities in the ore?
What is the term used to describe the large amount of unwanted impurities in the ore?
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