19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The two most abundant metals in the earth crust are:
Boron can be obtained by various methods but not by:
Identify the incorrect statement. (Odisha NEET 2019)
Which of the following has maximum iron content? (AIIMS 2019)
Which one is malachite from the following? (NEET 2019)
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)
Identify the correct statement from the following: (NEET 2020)
Match items of Column I with the items of Column II and assign the correct code : (NEET-I 2016) Column I Column II
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
The ore of aluminium is (UP CPMT 2013)
Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature? (NEET 2021)
Assertion: Extraction of iron metal from iron oxide ore is carried out by heating with coke. Reason: The reaction, Fe O (s) Fe(s)+ O (g) -> is a spontaneous process.
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)
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with (NEET 2016)
The correct order of the abundance of the elements in earth’s crust is (AIMPT 2011)
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with? (AIPMT 2012)
Which of the following pairs of metals is purified by van Arkel method? (AIPMT 2011)
Which of the following elements is present as the impurity to the maximum extent in the pig iron? (AIPMT 2011)
The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag. (AIPMT 2011)
Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of (AIPMT 2012)
Cupellation process is used in the metallurgy of: (AIPMT 2011)
In the cryolite CaCl2 is added to: (AIPMT 2009)