19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The ore of calcium which contains phosphorus is
The metal which mainly occurs as oxide ore in nature is:
Among the following, the most abundant metal in the earth’s crust is
In electrorefining of metals, the anode is made of
The maximum temperature that can be achieved in blast furnace is: (NEET 2021)
Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature? (NEET 2021)
Identify the correct statement from the following: (NEET 2020)
Which of the following has maximum iron content? (AIIMS 2019)
Identify the incorrect statement. (Odisha NEET 2019)
Which one is malachite from the following? (NEET 2019)
In the extraction of copper from its sulphide ore, the metal is formed by the reduction of Cu2O with (JIPMER 2018)
In Cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents are respectively. (JIPMER 2017)
Match items of Column I with the items of Column II and assign the correct code : (NEET-I 2016) Column I Column II
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with (NEET 2016)
Which one is malachite from the following? (NEET 2015) (a) 2 Cu OH (b) Fe O (c) CuCO .Cu OH (d) CuFeS
Identify the incorrect statement. (NEET Odisha 2015)
The ore of aluminium is (UP CPMT 2013)
The process of converting hydrated alumina into anhydrous alumina is called (AIPMT 2013)
The metal oxide which cannot be reduced to metal by carbon is (Karnataka NEET 2013)
Sulphide ores of metals are usually concentrated by Froth floatation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching? (AIPMT 2007)
Gº vs T plot in the Ellingham’s diagram slopes downwards for the reaction. (RPMT 2006) (a) Mg+ O MgO -> (b) 2Ag+ O Ag O -> (c) C O CO -> (d) CO O CO ->
Which of the following reactions taking place in the blast furnace during extraction of iron is endothermic? (RPMT 2006)
Consider the following reaction at 1000ºC. (AIPMT 2006) I. - Zn(s)+ O (g) ZnO(s);ΔG°=-360KJmol -> II. - C(gr)+ O (g) CO(g);ΔG°=-460KJmol -> Choose the correct statement at 1000ºC
The ore having two different metal atoms is (AIPMT 2006)
330 350K Ni 4CO Ni CO -> 450 470K Ni CO Ni 4CO -> The above reactions are of the purification of Ni by