Write a short note on impurity defects.
(N/A) - If molten $NaCl$ containing a small amount of $SrCl_2$ is crystallized,some of the sites of $Na^+$ ions are occupied by $Sr^{2+}$ ions.
- Each $Sr^{2+}$ ion replaces two $Na^+$ ions. It occupies one site,and the other site remains vacant.
- The number of cationic vacancies produced is equal to the number of $Sr^{2+}$ ions added.
- Example: Solid solution of $CdCl_2$ and $AgCl$.
- Each $Sr^{2+}$ ion replaces two $Na^+$ ions. It occupies one site,and the other site remains vacant.
- The number of cationic vacancies produced is equal to the number of $Sr^{2+}$ ions added.
- Example: Solid solution of $CdCl_2$ and $AgCl$.
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Similar Questions
Which of the following statements are not correct?
$(A)$ Diode is a combination of $n$-type and $p$-type semiconductors.
$(B)$ Silicon or germanium is electron rich impurity.
$(C)$ Phosphorus and arsenic are electron deficient impurities.
$(D)$ Schottky defect decreases the density of the crystal.
$(A)$ Diode is a combination of $n$-type and $p$-type semiconductors.
$(B)$ Silicon or germanium is electron rich impurity.
$(C)$ Phosphorus and arsenic are electron deficient impurities.
$(D)$ Schottky defect decreases the density of the crystal.
When $CaCl_2$ is added to $AgCl$ crystal,the defect introduced is
The correct statement$(s)$ regarding defects in solids is(are):
$A$. Frenkel defect is usually favoured by a very small difference in the sizes of cation and anion.
$B$. Frenkel defect is a dislocation defect.
$C$. Trapping of an electron in the lattice leads to the formation of $F$-center.
$D$. Schottky defects have no effect on the physical properties of solids.
$A$. Frenkel defect is usually favoured by a very small difference in the sizes of cation and anion.
$B$. Frenkel defect is a dislocation defect.
$C$. Trapping of an electron in the lattice leads to the formation of $F$-center.
$D$. Schottky defects have no effect on the physical properties of solids.
DifficultIIT 2009
View SolutionThe correct statement among the following,regarding defects in solids is:
$(1)$ Frenkel defect is favored by small difference in the sizes of cation and anion.
$(2)$ Frenkel defect is a metal excess defect.
$(3)$ Trapping of electron in the lattice leads to formation of $F$-centres.
$(4)$ Schottky defect has no effect on the physical property of solids.
$(1)$ Frenkel defect is favored by small difference in the sizes of cation and anion.
$(2)$ Frenkel defect is a metal excess defect.
$(3)$ Trapping of electron in the lattice leads to formation of $F$-centres.
$(4)$ Schottky defect has no effect on the physical property of solids.
The incorrect statement regarding defects in crystalline solid is
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