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The role of fluorspar CaF2 which is added in the electrolytic reduction of alumina dissolved in fused cryolite is (are)

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Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)

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Beta Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>EXERCISE-2>Q 28
Which of the following are correctly matched?
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Beta Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>EXERCISE-2>Q 29
Which of the following statements are correct in connection with the extraction of silver?
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Beta Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>EXERCISE-2>Q 31
NaCN used in the froth floatation method for the purification of ore is-
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Beta Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>EXERCISE-2>Q 34
Autoreduction process is used in the extraction of
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Beta Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>EXERCISE-2>Q 36
Out of the following, which ores are calcinated during extraction?
a Copper pyrites b Malachite C Bauxite
The correct answer is:
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Beta Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>EXERCISE-2>Q 38
Carbon cannot be used in the reduction of Al2O3 because
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Beta Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>EXERCISE-2>Q 39
Which of the following reaction is not involved in the mite process?
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Beta Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>EXERCISE-2>Q 40
In which of the following pairs, the minerals are converted in to metals by self-reduction process?