Advertisements
Advertisements
प्रश्न
Draw a neat labelled diagram.
Froth floatation method.
Advertisements
उत्तर
Froth floatation method-
APPEARS IN
संबंधित प्रश्न
What is aqua-regia? Name two special metals which are insoluble in common reagents but dissolve in aqua-regia.
How are metals refined by the electrolytic process? Describe the electrolytic refining of copper with the help of a neat labelled diagram.
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
Name one metal each occurring as :
A sulphine
Name one metal each occurring as :
An oxide
Ionic compounds are electrically _______.
Electrolysis is used to obtain pure metal from impure metal.
\[\ce{Cu2S + 3Cu2O -> 6Cu + SO2}\]
The above process is:
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:
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(i) Au
(ii) Cu
(iii) Na
(iv) K
An electrolytic cell consists of
- positively charged cathode
- negatively charged anode
- positively charged anode
- negatively charged cathode
Which one of the following figures correctly describes the process of electrolytic refining?
A reddish-brown metal ‘X’, when heated in air, gives a black compound ‘Y’, which when heated in the presence of H2 gas gives ‘X’ back. ‘X’ is refined by the process of electrolysis; this refined form of ‘X’ is used in electrical wiring. Identify ‘X’ and ‘Y’. Draw a well-labelled diagram to represent the process of refining ‘X’.
Answer the following question with reference to the electrorefining of copper:
What do you observe at the cathode?
Answer the following questions with reference to the electrorefining of copper:
Write the reaction taking place at the cathode.
