Advertisements
Advertisements
Question
Observe the figure and name and explain in brief the following method:
Advertisements
Solution
The method shown in the figure is froth floatation method.
- The froth floatation process is based on two opposite properties of the particles, hydrophilic and hydrophobic.
- The metal sulphide particles are hydrophobic. Due to this property, they get wetted mainly with oil. On the other hand, gangue particles are hydrophilic and get wetted by water.
- In this method, the finely divided metal ore is added in a big tank containing a large amount of water. To this, certain vegetable oil (pine oil, eucalyptus oil, etc.) is added is added for the formation of froth. A rotating agitator at the centre of the floatation tank agitates the mixture and draws air into it to form bubbles. As a result, foam is formed which carries metal sulphide particles. The foam rises to the surface of water and floats. Therefore, this method is called the froth floatation process.
- This method is used to separate metal sulphide ores such as zinc blende (ZnS) and copper pyrite (CuFeS2).
APPEARS IN
RELATED QUESTIONS
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is a more reactive metal.
Give the effect of heat on their: nitrates
A student has been collecting silver coins and copper coins. One day she observed a black
coating on silver coins and a green coating on copper coins. Which chemical phenomenon is
responsible for these coatings? Write the names of black and green coatings.
Name:
(b) two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen
On which factors does the purification of metals depend?
`2AgNO_3`
...........................
`2Cu_2O +Cu_2S`
......................
How is it removed?
Which metal is used for:
lithographic plates for printing
Complete the following flow chart and answer the questions below:
i) In which method pine oil is used?
ii) Explain what method of concentration in brief.
Cassiterite is a copper ore.
Draw a neat and labelled diagram for Froth Floatation Process.
Explain concept with example/explain with the help of a balanced equation.
Minerals
Complete flow chart given below.
Identify the following method of concentration of ores and explain briefly.
Complete the following flowchart.
Limestone is used as a flux in the extraction of ______.
In leaching of alumina from bauxite by Bayer's process, then ore is treated with ______.
A process of extracting metals from aqueous solutions of their salts using suitable reducing agents is called ______
Explain the following term:
Metallurgy
