CBSE Class 12 Chemistry Question Bank – Solid State

CBSE Class 12 Chemistry Question Bank – Solid State

  1. What is a crystal?
  2. What are the different types of crystalline solids?
  3. Define a unit cell
  4. Why do atoms /ions in a crystal pack closely? Give two examples of close-packed structures.
  5. What are the coordination numbers for hcp and ccp structures?
  6. What do you understand by the term “ packing efficiency” ?
  7. What is radius ratio? What is its significance?
  8. Why do different ionic compounds assume different geometries of arrangement?
  9. What are the two type of holes or voids found in the close-packed structure of ionic compounds?
  10. What do you undersatand by defects in solids/
  11. What is the difference between a stoichiometric and a nonstoichiometric defect?
  12. What is a dopant? How does it affect the conductivity of a semiconductor?
  13. What are ferrimagnetic materials?
  14. Why do some solids exhibit magnetic properties?
  15. What type (n or p) of a semiconductor is created by the addition of arsenic to a crystal of germanium?
  16. Gallium arsenide can be made an n-type or p-type semiconductor by replacing some of the arsenic by another element.Which of the elements Se , Sb or Sn will work?
  17. Does the addition of Al2O3 to ZnO create an n-type or p-type semiconductor?
  18. Does doping ZnO with Li2O create an n-type or p-type semiconductor?
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