General Principles and Processes of Isolation of Elements
Haematite , magnetite , iron pyrites , etc. are the minerals of iron. Which are the ores of iron among these minerals ?
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The main function of frothers is to _________________.
Assertion :Leaching is a process of reduction. Reason :Leaching involves treatment of the ore with a suitable reagent so as to make it soluble while impurities remains soluble.
Draw the diagram showing froth floatation method and label its parts.
Minerals from which metals can be preferably extracted are called :
Identify the term/substance in each of the following :(i) The tendency of an atom to attract electrons to itself when combined in a compound.(ii) The method used to separate ore from gangue by preferential wetting.(iii) The catalyst used in the conversion of ethyne to ethane.(iv) The type of reactions alkenes undergo.(v) The electrons present in the outermost shell of an atom.
Froth flotation method is used for the concentration of :
Account for the following facts:Pine oil is used in the froth floatation process used to concentrate sulphide.
What happens when NaCN is added in ore containing PbS and ZnS during concentration by froth floatation method?