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