19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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:
The chemical composition of ‘slag’ formed during the smelting process in the extraction of copper is
Carbonate of which of the following metal does not liberate carbon dioxide on heating:
Among the following statements, the incorrect one is:
Boron can be obtained by various methods but not by:
Select correct statement:
Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly
Formation of metallic copper from the sulphide ore in the commercial metallurgical process involves. (a) Cu S+ O Cu O+SO ; Cu O+C 2Cu+CO -> -> (b) Cu S O Cu O SO ; 2Cu O Cu S 6Cu SO -> -> (c) Cu S 2O CuSO ; CuSO C…