हिंदी

Write scientific reason. Magnetic separation method is used to separate the magnetic ingredients in the ores. - Science and Technology 1

Advertisements
Advertisements

प्रश्न

Write scientific reason.

Magnetic separation method is used to separate the magnetic ingredients in the ores.

स्पष्ट कीजिए
टिप्पणी लिखिए
Advertisements

उत्तर

  1. The magnetic separation process is based on the differences in magnetic properties of the ore components.
  2. When the powdered ore is dropped over the moving belt near nonmagnetic roller, the nonmagnetic particles are carried further along with belt and fall in the collector vessel placed away from magnetic roller. At the same time, the magnetic portion of the ore is attracted by the magnetic roller and falls in the collector vessel near the magnetic roller.
    Thus, magnetic separation method is used to separate the magnetic ingredients in the ores.
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Metallugy - Write scientific reasons

संबंधित प्रश्न

Give the importance of the following for living beings:

Carbon


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


Define the term ‘metallurgy’. State the processes involved in metallurgy ?


Explain the following term:

Gangue


An ore on being heated in air forms sulphurous anhydride. Write the process used for the concentration of this ore.


Name the methods used for purification?


`2AgNO_3` ...........................


`2Cu_2O +Cu_2S` ......................


state the reactions at the two electrodes ?


what does it form with silica present in the ore?


How is it removed?


Which metal is used for:

making pipes, buckets, water tanks,


Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.

Write three balanced equations for the purification of bauxite.


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.


Explain with reason:

Why is powdered coke sprinkled on top of the electrolyte?


A compound that is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.


The following is a sketch of an electrolytic cell used in the extraction of aluminium :

(a) What is the substance of which the electrode A and B are made?
(b) At which electrode (A or B) is aluminium formed?
(c) What are the two aluminium compounds in the electrolyte C?
(d) Why is it necessary for electrode B to be continuously replaced?


Write the molecular formulae of the following compound.

Copper pyrite


Draw a neat and labelled diagram for Froth Floatation Process.


Identify the following method of concentration of ores and explain briefly.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×