Advertisements
Advertisements
प्रश्न
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
In the extraction of aluminium Write the function and chemical formula of cryolite
Advertisements
उत्तर
Cryolite is added to the molten mixture of alumina to reduce the melting point. The formula of cryolite is Na3AlF6.
APPEARS IN
संबंधित प्रश्न
In the extraction of aluminium: Why is it necessary to replace anodes time to time?
Name two metals which are highly resistant to corrosion.
Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?
What iron compound is present in haematite ore? Also write its chemical formula.
How is sodium metal extracted? Explain with the help of equation of the reaction involved.
How is aluminium metal extracted? Explain with the help of an equation.
Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.
An ore of manganese metal is ______.
Which of the following metals can be obtained from haematite ore?
Aluminum is used in thermite welding:
write reaction for process?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
What is the function of cryolite used along with alumina as the electrolyte?
How are metals refined by the electrolytic methods?
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
State three objectives achieved during the roasting of ores.
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
Explain Bayer’s process of concentration of bauxite with a chemical equation.
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
