Advertisements
Advertisements
प्रश्न
Electrolysis is used to obtain pure metal from impure metal.
पर्याय
Right
Wrong
Advertisements
उत्तर
Electrolysis is used to obtain pure metal from impure metal- Right
APPEARS IN
संबंधित प्रश्न
What is aqua-regia?
What is meant by refining of a metal? Name the most widely used method for the refining of impure metals obtained by various reduction processes. Describe this method with the help of a labelled diagram by taking the example of any metal.
During the refining of an impure metal by electrolysis, the pure metal is a deposited ______.
Draw a neat labelled diagram.
Magnetic separation method.
Draw a neat labelled diagram.
Electrolytic reduction of alumina.
Which of the following process to be carried out to avoid the
formation of greenish layer on brass vessels due to corrosion?
Name one metal each occurring as :
A carbonate
Name one metal each occurring as :
An oxide
\[\ce{Cu2S + 3Cu2O -> 6Cu + SO2}\]
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
What are the constituents of solder alloy? Which property of solder makes it suitable for welding electrical wires?
Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements.
- Mg and N2
- Li and O2
- Al and Cl2
- K and O2
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.
