Advertisements
Advertisements
प्रश्न
Identify the following method of concentration of ores and explain briefly.
Advertisements
उत्तर
- This method represents Wilfley’s table of concentration of ores.
- Explanation:
- Wilfley’s table is made by fixing narrow, thin and long wooden riffles on an inclined surface.
- The table is given a regular vibrating motion.
- The powdered ore obtained from lumps of the ore using ball mill is fed on the top of Wilfley’s table and running stream of water is also released from the upper side.
- As a result, the lighter gangue particles are carried away by water and heavy ore particles in which proportion of minerals is more, settle between the wooden riffles fixed on the table and get collected on the slits between them.
APPEARS IN
संबंधित प्रश्न
Give the importance of the following for living beings:
Nitrogen
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Give the effect of heat on their ?
oxides
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Give the effect of heat on their: hydroxide
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.
What do you observe when hydrogen is passed over heated copper oxide?
With a labelled diagram, explain the electro-refining of a particular metal.
`Ag2O`
................................
Name a metal which forms a liquid alloy at ordinary temperature.
Arrange the metals in (2) in the decreasing order of reactivity.
Explain with reason:
Why is powdered coke sprinkled on top of the electrolyte?
Write the molecular formulae of the following compound.
Copper pyrite
Observe the figure and name and explain in brief the following method:
State the reason for the addition of caustic alkali to bauxite ore during the purification of bauxite.
Explain the smelting process.
Limestone is used as a flux in the extraction of ______.
Which of following metals occurs in native state?
Explain the following term:
Metallurgy
Identify false statement regarding lithium aluminium hydride?
