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How many types of allotropy exist?...

How many types of allotropy exist?

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Three Types namely, (a) enatiotropy, (b) monotropy, and (c ) dynamic allotropy.
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CENGAGE CHEMISTRY-NCERT BASED EXERCISE-Short Answer Type Questions
  1. What is the CN of cation and anion in a corundum structure?

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  2. What is the occurrence of different forms of the same compound called?

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  3. How many types of allotropy exist?

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  4. How can a substance be made amorphous?

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  5. Why does ZnO show increased electrical conductivity and turns yellow o...

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  6. Why NiO and FeO are nonstroichiometric with the formula Ni(0.98)O and ...

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  7. Why the defectsof the crystalline solids are called thermodynamic defe...

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  8. Why stoichiometric defects are also called intrinsic defects?

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  9. Give the name of one solid which shows both Schottky and Frenkel defec...

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  10. Why Frenkel defects are not found in pure alkali metal halides?

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  11. Why common salt (NaCl) sometimes appear yellow?

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  12. How do the electrical conductivity and resistivity of metallic conduct...

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  13. What is energy gap in bond theory?

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  14. What is photo voltaic cell?

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  15. What happens when ferrimagnetic Fe(3)O(4) is heated to 850 K?

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  16. What happens when ferromagnetic substance is heated to high temperatur...

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  17. Which type of defect is product when NaCl is dopped with AlCl(3)?

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  18. Which point defect lowers the density of a crystal?

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  19. At what temperature range most of the metals becomes superconductors

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  20. What is curie temperature?

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