19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following reactions represents the self- reduction process? (a) (b) (c)
Thomas slag is
Which of the following reactions represents the self- reduction process? (a) (b) (c)
Out of the following metals that cannot be obtained by electrolysis of the aqueous solution of their salts is
Heating pyrites to remove sulphur is called
Which of the following metals cannot be extracted by the carbon reduction process?
Heating with carbon in absence of air is known as :
Which of the following metals is obtained by electrolytic reduction process:
An element whose electronic configuration is 4s13d10. The possibility of element is
Identify the ore not containing iron. (UP CPMT 2012)
Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of (AIPMT 2012)
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with? (AIPMT 2012)
The correct order of the abundance of the elements in earth’s crust is (AIMPT 2011)
Which of the following pairs of metals is purified by van Arkel method? (AIPMT 2011)
The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag. (AIPMT 2011)
Which of the following elements is present as the impurity to the maximum extent in the pig iron? (AIPMT 2011)
Cupellation process is used in the metallurgy of: (AIPMT 2011)
Which of the following diagram explain extraction of metal from metal oxide: (RPMT 2010)
The minimum voltage required to electrolyse alumina in the Hall-Heroult process is (Given, o f G Al O 1520kJ mol ; o f G CO 394kJmol ) (AIIMS 2009)
In the cryolite CaCl2 is added to: (AIPMT 2009)
Electrolytic reduction of alumina to aluminium by the Hall-Heroult process is carried out
Which of the following statements is correct?
The major role of fluorspar (CaF2) which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6) is
During the electrolytic reduction of aluminium, the carbon anodes are replaced from time to time because
Which of the following is a fluoride ore?