Advertisements
Advertisements
प्रश्न
Explain the following term:
Metallurgy
उत्तर
The extraction of metals from their ores and then refining them for use is known as metallurgy.
APPEARS IN
संबंधित प्रश्न
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Identify A and B and give their reactions with dil HCL and dil H2SO4 ?
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Give the effect of heat on their: hydroxide
A student has been collecting silver coins and copper coins. One day she observed a black
coating on silver coins and a green coating on copper coins. Which chemical phenomenon is
responsible for these coatings? Write the names of black and green coatings.
Name:
(a) the processes involved in
concentration :-
`Ag2O`
................................
`MnO_2 + 4Al` 
…………….
`HgS + O_2`
..................
Give the ionization reactions of electrolyte used in Hall’s process. write the reaction at the cathode and the anode. Why the anode has to be replaced in this process?
state the reactions at the two electrodes ?
Which metal is used for:
lithographic plates for printing
Explain the term of Metallurgy .
Complete the following flow chart and answer the questions below:
i) In which method pine oil is used?
ii) Explain what method of concentration in brief.
The following is a sketch of an electrolytic cell used in the extraction of aluminium :
(a) What is the substance of which the electrode A and B are made?
(b) At which electrode (A or B) is aluminium formed?
(c) What are the two aluminium compounds in the electrolyte C?
(d) Why is it necessary for electrode B to be continuously replaced?
In Wilfley table method to separate particles of gangue _______ method is used.
Draw a neat and labelled diagram for Froth Floatation Process.
Identify the following method of concentration of ores and explain briefly.
Chemical formula of rust is ______
The chemical name of rust is ______.
Explain the smelting process.
In leaching of alumina from bauxite by Bayer's process, then ore is treated with ______.
