EASY
JEE Main
IMPORTANT
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Which of the following statements is correct about the role of substances added in the froth floatation process?
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Important Questions on General Principles and Processes of Isolation of Elements
MEDIUM
JEE Main
IMPORTANT
In the froth flotation process, zinc sulphide and lead sulphide can be separated by which of the following?
MEDIUM
JEE Main
IMPORTANT
Which of the following reactions occur during calcination?
MEDIUM
JEE Main
IMPORTANT
Wrought iron is the purest form of iron. Write a reaction used for the preparation of wrought iron from cast iron. How can the impurities of sulphur, silicon and phosphorus be removed from cast iron?
EASY
JEE Main
IMPORTANT
Why is sulfide ore of copper heated in a furnace after mixing with silica?
MEDIUM
JEE Main
IMPORTANT
Write the chemical reactions involved in the extraction of gold by cyanide process. Also, give the role of zinc in the extraction.
HARD
JEE Main
IMPORTANT
The extraction of by leaching with involves both oxidation and reduction. Justify this by giving equations.
MEDIUM
JEE Main
IMPORTANT
Select the correct matching.
MEDIUM
JEE Main
IMPORTANT
The function of fluorspar in the electrolytic reduction of alumina dissolved in fused cryolite is:
