19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following ligands is used to form the complex from which silver is extracted?
In the process of extraction of gold, Roasted gold ore + CN – + H2O -> [X] + HO – [X] + Zn -> [Y] + Au Identify the complexes [X] and [Y]
Silver is obtained from Na [Ag(CN)2] by reaction with:
Cassiterite is an ore of
Copper and lead are mainly extracted by
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with? (AIPMT 2012)
Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of (AIPMT 2012)
Identify the ore not containing iron. (UP CPMT 2012)
Roasting of sulphides give the gas X as a by-product. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic…
The metal oxide which cannot be reduced to metal by carbon is (Karnataka NEET 2013)
The process of converting hydrated alumina into anhydrous alumina is called (AIPMT 2013)
The ore of aluminium is (UP CPMT 2013)
Identify the incorrect statement. (NEET Odisha 2015)
Which one is malachite from the following? (NEET 2015) (a) 2 Cu OH (b) Fe O (c) CuCO .Cu OH (d) CuFeS
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with (NEET 2016)
Match items of Column I with the items of Column II and assign the correct code : (NEET-I 2016) Column I Column II
In Cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents are respectively. (JIPMER 2017)
In the extraction of copper from its sulphide ore, the metal is formed by the reduction of Cu2O with (JIPMER 2018)
Which one is malachite from the following? (NEET 2019)
Identify the incorrect statement. (Odisha NEET 2019)
Which of the following has maximum iron content? (AIIMS 2019)
Identify the correct statement from the following: (NEET 2020)
Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature? (NEET 2021)
The maximum temperature that can be achieved in blast furnace is: (NEET 2021)
The two most abundant metals in the earth crust are: