19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Flux is used to remove:
Which one of the following ores is best concentrated by froth floatation method?
In the froth floatation process for benefaction of the ores, the ore particles float because
An element whose electronic configuration is 4s13d10. The possibility of element is
Which of the following benefaction processes is used for the mineral, Al2O3.2H2O?
Chemical leaching is useful in the concentration of:
Wolframite (FeWO4), present as an impurity in cassiterite (SnO2), can be removed by the process of
In the froth-floatation process, the sulphide ores are concentrated by mixing the ore with
In the froth-floatation process, the ore particles float because
Sulphide ores are generally concentrated by the
Concentration of ores is not done by the
Silicon is the main constituent of
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)
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)