Advertisements
Advertisements
प्रश्न
State the reason for the addition of caustic alkali to bauxite ore during the purification of bauxite.
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
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: carbonates
Define the term ‘metallurgy’. State the processes involved in metallurgy ?
Explain the following term:
Gangue
What do you observe when hydrogen is passed over heated copper oxide?
Which metal is used for:
making pipes, buckets, water tanks,
The chemical formula of zinc blend is _______.
Complete the following flowchart.
After partial roasting, the sulphide of copper is reduced by ______.
Calcination is used in metallurgy for the removal of?
