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
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.
On which factors does the purification of metals depend?
`2AgNO_3`
...........................
`HgS + O_2`
..................
what does it form with silica present in the ore?
Name a metal which forms a liquid alloy at ordinary temperature.
Explain concept with example/explain with the help of a balanced equation.
Minerals
Bassemerisation is used in the extraction of ______.
Name the process that is employed to refine aluminium.
