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(a) What type of semiconductor is obtai...

(a) What type of semiconductor is obtained when silicon is doped with boron ?
(b) What type of magnetism is shown in the following alignment of magnetic moments?
`uarr uarr uarr uarr uarr uarr`
(c ) What type of point defect is produced when AgCl is doped with `CdCl_2` ?

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(a) When silicon is doped with boron, P-type semiconductor is obtained. ltbr. (b) The magenetism shown in the alignment of magnetic moments is ferromagnetism.
(c ) impurity defect is produced when AgClis doped with `CdCl_2`.
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XII BOARDS PREVIOUS YEAR-XII BOARDS-Set -I
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  2. Chlorobenzene is extremely less reactive towards nucleophilic substitu...

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  3. Explain the mechanism of the reaction is given below : 2CH3-CH2-OHund...

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  4. How will you convert (i) Propene to Propan-2-ol? (ii) Phenol to 2...

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  5. (a) What type of semiconductor is obtained when silicon is doped with...

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  6. Datermine the osmotic pressure of a solution prepared by dissolving 2....

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  7. Calculate the emf of the following cell at 298K: Fe(s)|Fe^(2+)(0.001...

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  8. How would you account for the following? (l) Transition metals exhib...

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  9. Complete the following chemical equations : (i) Cr2O6^(2-)+6Fe^(2+)...

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  10. Write the IUPAC names of the following coordination coordination compo...

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  11. Given the stuctures of A,B and C in the following reactions- (i) C6...

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  12. Write the names and structures of the monomers of the following polyme...

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  13. After watching a programme on TV about the adverse effects of junk foo...

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  14. (a) Which one of the folJowing is a food preservative? Equanil, Mor...

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  15. (a) A reaction is second order in A and first order in B . (i) Write...

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  16. (a) For a first order reaction, show that time required for 99% compl...

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  17. (a) Given reasons for the following : (i) Bond enthalpy of F2 is low...

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  18. (a) Account for the following : (i) Helium is used in diving apparat...

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  19. (a) Although phenoxide ion has more number of resonating structures th...

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  20. Complete the following reactions : (b) Give simple chemical tests t...

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