Which of the metal is extracted by Hall-Heroult process?
In the metullargy of iron , limestone is added to coke . Which acts as a
Sulphide ore is converted to oxide form by using the process
Match items in column - I with the items of column – II and assign the correct code.
Extraction of gold and silver involves leaching with cyanide ion. silver is later recovered by
A mixture containing sulphides of copper and iron is called
Which of the following is commonly used to produce foam in froth floatation process?
Cinnabar is the sulphide ore of ________ metal
Magnetic Separation it is based on the difference in the __________ of the ore and the impurities.
The percentage of carbon in high carbon steel is ____________
Froth Floatation process is suitable for concentrating ___________ oress
Which one of the following element is present as an impurity in pig iron?
Which one of the following ores is best concentrated by froth – floatation method?
Which one of the following is not feasible
Magnesite is __________
Zinc is obtained from ZnO by
Electro Chemical process is used to extract
In the extraction of aluminium from alumina by electrolysis, cryolite is added to
Flux is asubstance which is used to convert
Identify the halide ore among the following
Which of the following plot gives Ellingham diagram
Which of the following is used for concentrating ore in metallurgy?
Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?
Semiconductors are purified by _________ Method.
The process f heating copper pyrites to remove sulphur is called
Pick out the alloy that contains a non metal as a constituent in it
Identify the metal that occurs in free state
Identify the decreasing order of carbon content in different forms of iron
Which of the following will give respective metal by self reduction ?
Wolframite ore is separated from tinstone by the process of
Which metal is used for extraction of Au and ag and also for galvanisation of iron objects ?
Zinc is extracted from zinc blende by_________
Name the process by which elements such as germanium ,silicon and galium are refined.
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with
Roasting of sulphide ore gives the gas (A).(A) is a colourless gas. Aqueous solution of (A)is acidic. The gas (A) is
Concatenation of copper glance is done by
Which of the following is not a mineral of aluminium?
Sodium , Aluminium and magnesium can be obtained from their ore by
In the electrolytic refining of copper, which one of the following is used as anode?
Which of the following mineral contains calcium as well as magnesium ?
Bauxite has the composition
Which of the following is not true with respect to Ellingham diagram?
Cupellation is a process used for the refining of
Considering Ellingham diagram, which of the following metals can be used to reduce alumina?
The incorrect statement among the following is