19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Aluminium is extracted by the electrolysis of
In the context of the Hall - Heroult process for the extraction of Al, which of the following statements is false?
Cryolite is:
Electrolytic reduction of alumina to aluminium by the Hall-Heroult process is carried out
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?
Aluminium is not present in which of the following mineral?
In extractive metallurgy of zinc, partial fusion of ZnO with coke is called
In extractive metallurgy of zinc, partial fusion of ZnO with coke is called
Extraction for zinc from zinc blende is achieved by
The electrometallurgical process (electrolysis of fused salts) is employed to extract
Of the following metals, the one which cannot be obtained by the electrolysis of the aqueous solution of its salt is
Which of the following minerals contains calcium as well as magnesium?
The mineral carnallite contains
Silver can be separated from lead by:
Copper and lead are mainly extracted by
Cassiterite is an ore of
Which of the following statements is correct?
Silver is obtained from Na [Ag(CN)2] by reaction with:
An element whose electronic configuration is 4s13d10. The possibility of element is
In the process of extraction of gold, Roasted gold ore + CN – + H2O -> [X] + HO – [X] + Zn -> [Y] + Au Identify the complexes [X] and [Y]
Which of the following ligands is used to form the complex from which silver is extracted?
The cyanide process is used for the extraction of
Which of the following is a sulphide ore?