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Semiconductors are manufactured by addit...

Semiconductors are manufactured by addition of impurities of

A

s-block elements

B

actinoids

C

lanthanoids

D

p-block elements

Text Solution

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The correct Answer is:
D
Trivalent or pentavalent atom present p-block.
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P -type semiconductors are made by adding impurity element

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MARVEL PUBLICATION-SOLID STATE-TEST YOUR GRASP
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  2. The factor which makes a solid to have a low density is

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  3. The close-packed layers in the faece-centred cubic unit cell are perpe...

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  4. Bragg equation for the scattering of X-rays by crystal is

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  5. Which of the following dimensions represent a hexagonal unit cell ?

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  6. Which of the following lattices does not have only primitive Bravais l...

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  7. Which of the following species is not paramagnetic?

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  8. When electron are trapped into the crystal in anion cancy ,the defect ...

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  9. The 8:8 type packing is present in

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  10. The unit cell length of sodium chloride crystal is 360 pm. Its density...

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  11. A substance which has face-centred cubic crystal has a density of 2.1...

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  12. The fraction of volume occupied by atoms in a face centered cubic unit...

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  13. The unit cell of an element having atomic mass 100 and density 12 g cm...

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  14. A solid AB has NaCl structure. If the radius of the cation A is 100 pm...

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  15. The phenomenon in which different chemical substances exhibit the same...

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  16. In a close packed array of N spheres, the number of tetrahedral holes ...

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  17. Solid iodine (I(2)) is an example of

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  18. Which of the crystals should be the softest and have the lowest boilin...

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  19. A semiconductor of Ge can be made p-type by adding

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  20. What is the co-ordination number of each sphere in (i) Hexagonal clo...

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  21. In a ferromagnetic material

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