In froth floatation, chemical agent added to cause air adherence is called

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

A

Cresylic acid

B

Xanthaies

C

Pine oil

D

All of the above

How is permaculture farming different from conventional chemical farming? 1. Permaculture farming discourages monocultural practices but in conventional chemical farming, monoculture practices are predominant. 2. Conventional chemical farming can cause an increase in soil salinity but the occurrence of such phenomenon is not observed in permaculture farming. 3. Conventional chemical farming is easily possible in semi-arid regions but permaculture farming is not so easily possible in such regions. 4. Practice of mulching is very important in permaculture farming but not necessarily so conventional chemical farming Select the correct answer using the code given below.

A

1 and 3

B

1, 2 and 4

C

4 only

D

2 and 3

What is purpose of froth in froth pumps?

A

Separates rich minerals

B

Mixes rich minerals

C

Removes ores

D

Detects oil

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 process to concentrate the minerals is applicable to

A

Calamine

B

Chalcopyrites

C

Bauxite

D

Haematite

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

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 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

In froth floatation, chemical agent added to cause air adherence is called

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