Advertisements
Advertisements
प्रश्न
Electrolysis is used to obtain pure metal from impure metal.
विकल्प
Right
Wrong
Advertisements
उत्तर
Electrolysis is used to obtain pure metal from impure metal- Right
APPEARS IN
संबंधित प्रश्न
What is aqua-regia? Name two special metals which are insoluble in common reagents but dissolve in aqua-regia.
Name one method for the refining of metals.
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.
Name any five metals which are purified by electrolytic refining method.
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.
Froth floatation 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 sulphine
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
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?
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
Identify the terms for the following:
The electrode where reduction takes place.
