Advertisements
Advertisements
प्रश्न
What are the constituents of solder alloy? Which property of solder makes it suitable for welding electrical wires?
उत्तर
The main constituents of solder alloy are tin and lead in a ratio of 60 : 40. Solder alloy has a low melting point of 188° C, this low melting point makes it suitable for soldering electrical wires.
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.
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
Which of the following process to be carried out to avoid the
formation of greenish layer on brass vessels due to corrosion?
An electrolytic cell consists of
- positively charged cathode
- negatively charged anode
- positively charged anode
- negatively charged cathode
Identify the terms for the following:
The electrode where reduction takes place.
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 is the anode made of?
Answer the following questions with reference to the electrorefining of copper:
Write the reaction taking place at the cathode.
