Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to

A. Achieve very high purity of aluminium (99.9%)

B. Keep the electrolyte in liquid condition by the generation of heat

C. Electrolytically dissociate alumina

D. Both (B) & (C)

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. Density in the solid state is slightly less than that in its liquid state, in case of
  2. Wrought iron does not have
  3. Hydrogen in liquid steels is dissolved
  4. The difference between gross & net calorific values of fuel is due to the
  5. Normalising of an object does not
  6. Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion…
  7. While the bin cards are used in the effective stores management, the queuing theory is associated with…
  8. During sensible heating of humid air
  9. The transition temperature at which all the ferromagnetic materials become paramagnetic materials is…
  10. Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare…
  11. __________ is the most suitable lubricant for drawing mild steel wires?
  12. Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other…
  13. The condition of diffraction from a crystal is given by
  14. Steel is welded using the __________ flame.
  15. The most serious manufacturing defect from fracture toughness point of view is
  16. Which of the following is the most suitable material of construction for the condenser tubes, where…
  17. Pick out the wrong statement about nucleate boiling.
  18. Vernier calipers cannot be used to measure the
  19. Oxyacetylene reducing flame is used while carrying out welding on
  20. Ceramic compounds as compared to metallic compounds
  21. Superheating of steam is done at constant
  22. At absolute zero temperature, for any reaction involving condensed phases
  23. __________ rubber is generally used for making 'O' rings used for vacuum sealings.
  24. An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform…
  25. Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
  26. Which one of the following is incombustible?
  27. What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer…
  28. __________ temperature remains constant during adiabatic saturation process of unsaturated air.
  29. Mild steel has __________ crystal lattice structure.
  30. Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.