Related Questions

Ore concentration by froth floatation utilises the __________ of ore particles.
A Density difference
B Wetting characteristics
C Terminal velocities
D None of these
Froth floatation process to concentrate the minerals is applicable to
A Calamine
B Chalcopyrites
C Bauxite
D Haematite
In froth floatation, chemical agent added to cause air adherence is called
A Collector
B Frother
C Modifier
D Activator
The oil used in the froth floatation process is
A coconut oil
B olive oil
C kerosene oil
D pine oil
Pine oil used in froth floatation technique acts as a/an
A Collector
B Modifier
C Frother
D Activator
Pine oil and cresylic acid are used as __________ in the froth floatation process.
A Frother
B Collector
C Depressor
D Conditioner
Froth floatation is used for
A [

A. Washing fine coal dust (

B. Washing lump coal (> 80 mm size)

B Removing ash from the coal based on difference in specific gravity of coal and ash
C All of the above
Xanthates are used in the froth floatation process as a/an
A Conditioner
B Frother
C Collector
D Activator
Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?
A Cresylic acid
B Copper sulphate
C Calcium carbonate
D Sodium carbonate
Role of a "collector" in froth floatation is to
A Form a water repelling film on the mineral surface
B Create and stabilise the froth
C Act as a surface
D Collect the minerals according to their specific gravity

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