Isolation of Elements

The role of depressants in 'Froth Flotation method' is to

Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex [A], which on reaction with zinc forms the elemental gold and another complex [B]. [A] and [B], respectively are :

Given below are two statements : Statement I : In froth floatation method of rotating paddle agitates the mixture to drive air out of it. Statement II : Iron pyrites and generally avoided for extraction of iron due to environmental reasons. In the light of the above statements, choose the correct answer from the options given below :

Which one of the following is not an example of calcination?

Given below are two statements : Statement I : In the metallurgy process, sulphide ore is converted to oxide before reduction. Statement II : Oxide ores in general are easier to reduce. In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following is used as a stabilizer during the concentration of sulphide ores?

With respect to an ore, Ellingham diagram helps to predict the feasibility of its.

An Ellingham diagram provides information about :

Ellingham diagram is a graphical representation of :

The statement is incorrect about Ellingham diagram is