Advertisements
Advertisements
प्रश्न
State the reason for the addition of caustic alkali to bauxite ore during the purification of bauxite.
Advertisements
उत्तर
Naturally, Bauxite is not soluble in normal solvents. Therefore the addition of caustic alkali to bauxite plays an important role while the extraction of aluminum. Caustic alkali dissolves bauxite forming soluble sodium meta aluminate while impurities remain insoluble and precipitate as red mud.
\[\ce{\underset{\text{(Bauxite)}}{Al2O3}.2H2O + 2NaOH -> \underset{\text{(Sodium meta aluminate)}}{2NaAlO2 + 3H2O}}\]
APPEARS IN
संबंधित प्रश्न
An ore on being heated in air forms sulphurous anhydride. Write the process used for the concentration of this ore.
How is it removed?
Name a metal which forms a liquid alloy at ordinary temperature.
In Wilfley table method to separate particles of gangue _______ method is used.
Match the columns.
| Group A | Group B |
| 1. ZnS | a) Copper Sulphide |
| 2. HgS | b) Bauxite |
| c) Cinnabar | |
| d) Zinc blend |
Draw a neat and labelled diagram for Froth Floatation Process.
Explain concept with example/explain with the help of a balanced equation.
Gangue
Complete flow chart given below.
Which of following metals occurs in native state?
Explain the following term:
Metallurgy
