Which of the following is used as a stabilizer during the concen tration of sulphide ores?
Cresols are used as froth stabilizers in the concentration of sulfide ores by froth f lotation
The correct option is (C): Cresol
Creson and aniline are used as stabilizers.
Pine oil, fatty acid, and xanthates are used as collectors.
A bob of mass \(m\) is suspended at a point \(O\) by a light string of length \(l\) and left to perform vertical motion (circular) as shown in the figure. Initially, by applying horizontal velocity \(v_0\) at the point ‘A’, the string becomes slack when the bob reaches at the point ‘D’. The ratio of the kinetic energy of the bob at the points B and C is: 
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.

Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –