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प्रश्न
Out of PbS and PbCO3 (ores of lead), which one is concentrated by froth floatation process preferably?
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उत्तर
PbS
संबंधित प्रश्न
What is meant by the term “chromatography”?
Indicate the principle behind the method used for the refining of Nickel.
Outline the principles behind the refining of metals by the following methods:
Chromatographic method
Write the principle behind the following methods of refining:
Vapour-phase refining
Zone refining is based on the principle that ______.
In the extraction of chlorine from brine:
(i) ∆GΘ for the overall reaction is negative.
(ii) ∆GΘ for the overall reaction is positive.
(iii) EΘ for overall reaction has negative value.
(iv) EΘ for overall reaction has positive value.
Why is an external emf of more than 2.2 V required for the extraction of \[\ce{Cl2}\] from brine?
Write two basic requirements for refining of a metal by Mond process and by Van Arkel Method.
Give two requirements for vapour phase refining.
Describe a method for refining nickel.
