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प्रश्न
Name one method for the refining of metals.
उत्तर
Electrolytic refining method is the most significant method used for refining of metals. Several metals like Cu, Zn, Au, Cr, Pb, Sn, Ni and Ag are refined by this process.
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संबंधित प्रश्न
Name any five metals which are purified by electrolytic refining method.
During the refining of an impure metal by electrolysis, the pure metal is a deposited:
(a) at cathode
(b) on the walls of electrolytic tank
(c) at anode
(d) at the bottom of electrolytic tank
Explain how the following metals are obtained from their compounds by the reduction process:
(i) Metal M which is in the middle of the reactivity series.
(ii) Metal N which is high up in the reactivity series.
Give one example of each type
Draw a neat labelled diagram.
Magnetic separation method.
Which of the following process to be carried out to avoid the
formation of greenish layer on brass vessels due to corrosion?
Ionic compounds are electrically _______.
Bauxite is mixed with cryolite so as to
(i) reduce its melting point
(ii) increase its electrical conductivity
(iii) molten cryolite acts as a solvent
(iv) increase its melting point
In the electrolytic refining of copper, the electrolyte used is:
Identify the terms for the following:
The electrode where reduction takes place.
Answer the following questions with reference to the electrorefining of copper:
Write the reaction taking place at the cathode.
