12th Chemistry Important Questions Unit 1 METALLURGY

12th Chemistry Important Questions Unit 1 METALLURGY. TN 12th Standard Chemistry Important 2 Marks, 12th Chemistry Important 3 Marks, Chemistry Important 5 Marks Questions Based on reduced Syllabus 2021-2022. 12th Free Online Test (MCQs). 12th Tamil Full Guide.

1. METALLURGY

• 1. Explain Froth flotation
• 2. Explain Gravity separation or Hydraulicwash
• 3. What is Calcination?
• 4. What is Smelting?
• 5. Explain Magnetic separation
• 6. Explain the principle of the Froth flotation process
• 7. Explain zone refining process with an example .
• 8. Explain the following terms with suitable examples. (i) Gangue (ii)slag
• 9. Give the basic requirement for vapour phase refining.
• 10. Describe the role of the following in the process mentioned.
  (i) Silica in the extraction ofcopper.
  (ii) Iodine in the refining of Zirconium.
  (iii) Sodium cyanide in frothfloatation.
• 11. Explain the principle of electrolytic refining with an example.
• 12. Explain Reduction by Hydrogen
• 13. What is the difference between minerals and ores?
• 14. What are the various steps involved in the extraction of pure metals from their ores?
• 15. What is the role of Limestone in the extraction of Iron from its oxideFe² O³?
• 16. Which type of ores can be concentrated by froth floatation method? Give two examples for suchores.
• 17. Describe Mond process for refiningNickel.
• 18. What is anode mud
• 19. Explain Electrolytic refining of Silver
• 20. Write a note on Van-Arkel (method for refiningzirconium/titanium)
• 21. What is Roasting?
• 22. What is leaching?
• 23. What is blistered copper?
• 24. Explain electrolytic refining of Silver
• 25. Write one name for Oxide ores of the following metals a) Aluminium b) Iron c) Copper d) Zinc
• 26. Give one example for Ore, Frothing agent, collector, and depressing agent which are using in Froth floation.
• 27. Differentiate Roasting and Calcination.
• 28. Explain Reduction by carbon
• 29. Explain the Aluminothermic process
• 30. Explain extraction of copper
• 31. Write about distillation
• 32. What is the role of the depressing agents in Froth flotation process?
• 33. How is Cr² O³ reduced to Cr by Al power?
• 34. Explain Cyanide leaching
• 35. Explain Ammonia leaching
• 36. Explain Alkali leaching
• 37. Explain Acid leaching
• 38. Write a note on auto-reduction
• 39. Write a note on Liquation
• 40. What is meant by the concentration of the ore

12th Chemistry All Units Important Questions