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p-type semi conductor is formed when tra...

p-type semi conductor is formed when trace amount of impurity is added to silicon. The number of valence electrons in the impurity atom must be

A

3

B

5

C

1

D

2

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CHETANA PUBLICATION-SOLID STATE-EXERCISE
  1. In crystalline solid few of the cations moved from their positions int...

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  2. Semicoductors are manufactured by addition of impurities of

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  3. p-type semi conductor is formed when trace amount of impurity is added...

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  4. n-type semiconductor is formed when trace amount of impurity is added ...

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  5. Which is covalent network solid?

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  6. Which one of the following is a good conductor of electricity?

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  7. Which of the following defect, if presetn, lowers the density of the c...

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  8. How many kinds of space lattices are possible in a crystal?

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  9. Which has minimum present volume occupied by the sphere?

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  10. In hcp structure, the packing fraction is

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  11. Which of the followign best defines a crystal?

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  12. Calculate number of atoms in : SSC

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  13. Calculate number of atoms in : FCC

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  14. Calculate number of atoms in : BCC

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  15. Sodium chlorid crystal consists of:

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  16. In a face-centred cubic arrangement of metal, the co-ordination number...

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  17. The co-ordination number of hexagonal closest packed structure is

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  18. The atomic radius for a face-centred cubic cell of lattice parameter '...

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  19. The number of atoms per unit cell is 2, the arrangement is

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  20. The name given to the ABABABAB… type of arrangement is

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