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प्रश्न
Which of the following process to be carried out to avoid the
formation of greenish layer on brass vessels due to corrosion?
विकल्प
a) plating
b) anodization
c) tinning
d) alloying
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उत्तर
c) tinning
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संबंधित प्रश्न
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.
Draw a neat labelled diagram.
Magnetic separation method.
Draw a neat labelled diagram.
Froth floatation method.
Name one metal each occurring as :
A sulphine
Name one metal each occurring as :
A carbonate
Name one metal each occurring as :
An oxide
The lightest liquid metal is ____________.
\[\ce{Cu2S + 3Cu2O -> 6Cu + SO2}\]
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
During electrolytic refining of zinc, it gets
Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
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?
Answer the following question with reference to the electrorefining of copper:
What is the anode made of?
