19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following metals is refined by the van Arkel process?
Which of the following mixtures is called matte?
The liquation process is used for the purification of
Of the following metals, the one which cannot be obtained by the electrolysis of the aqueous solution of its salt is
Out of the following metals that cannot be obtained by electrolysis of the aqueous solution of their salts is
Which of the following reactions represents the self- reduction process? (a) (b) (c)
Cryolite is:
Heating pyrites to remove sulphur is called
Thomas slag is
Which of the following metals is obtained by electrolytic reduction process:
Heating with carbon in absence of air is known as :
In the cryolite CaCl2 is added to: (AIPMT 2009)
Which of the following metals cannot be extracted by the carbon reduction process?
Which of the following reactions represents the self- reduction process? (a) (b) (c)
Roasting or ores is done
Which of the following changes take place during roasting?
Which one of the following reactions represents a calcination reaction?
The main function of roasting is
By which of the following processes is an oxide ore reduced to the free metal?
Calcination of ores involves heating the ore below its fusion temperature
The metal which is extracted by electrolytic reduction is
Which of the following pair is incorrectly matched?
In the froth floatation process for benefaction of the ores, the ore particles float because
Which one of the following ores is best concentrated by froth floatation method?
Which of the following benefaction processes is used for the mineral, Al2O3.2H2O?