Imperfections in Solids or Point Defects
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CHXII01:THE SOLID STATE

318833 An analysis shows that the oxide of nickel consists of nickel ion with \(96 \%\) ions having d \({ }^{8}\) configuration and \(4 \%\) having \(\mathrm{d}^{7}\) configuration. Which one of the following represents the formula of the oxide best ?

1 \(\mathrm{Ni}_{0.98} \mathrm{O}_{0.98}\)
2 \(\mathrm{Ni}_{1.02} \mathrm{O}_{1.02}\)
3 \(\mathrm{Ni}_{1.02} \mathrm{O}_{1.00}\)
4 \(\mathrm{Ni}_{0.98} \mathrm{O}_{1.00}\)
NCERT Exemplar
CHXII01:THE SOLID STATE

318834 Which type of 'defect' has the presence of cations in the interstitial sites?

1 Vacancy defect
2 Frenkel defect
3 metal deficiency defect
4 Schottky defect
CHXII01:THE SOLID STATE

318835 Among the following, the correct statement is

1 Schottky defect is shown by \(\mathrm{ZnS}\) and \(\mathrm{AgI}\)
2 Frenkel defect increases the dielectric constant of the crystals.
3 Stoichiometric defects make the crystals bad electrical conductors.
4 Frenkel defect decreases the density.
CHXII01:THE SOLID STATE

318836 Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion :
In a particular point defect, an ionic solid is electrically neutral, even if few of its cations are missing from its unit cells.
Reason :
In an ionic solid, Frenkel defect arises due to dislocation of cation from its lattice site to interstitial site, maintaining overall electrical neutrality.

1 Both (A) and (R) are correct and (R) is the correct explanation of the Assertion.
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct.
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
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CHXII01:THE SOLID STATE

318833 An analysis shows that the oxide of nickel consists of nickel ion with \(96 \%\) ions having d \({ }^{8}\) configuration and \(4 \%\) having \(\mathrm{d}^{7}\) configuration. Which one of the following represents the formula of the oxide best ?

1 \(\mathrm{Ni}_{0.98} \mathrm{O}_{0.98}\)
2 \(\mathrm{Ni}_{1.02} \mathrm{O}_{1.02}\)
3 \(\mathrm{Ni}_{1.02} \mathrm{O}_{1.00}\)
4 \(\mathrm{Ni}_{0.98} \mathrm{O}_{1.00}\)
NCERT Exemplar
CHXII01:THE SOLID STATE

318834 Which type of 'defect' has the presence of cations in the interstitial sites?

1 Vacancy defect
2 Frenkel defect
3 metal deficiency defect
4 Schottky defect
CHXII01:THE SOLID STATE

318835 Among the following, the correct statement is

1 Schottky defect is shown by \(\mathrm{ZnS}\) and \(\mathrm{AgI}\)
2 Frenkel defect increases the dielectric constant of the crystals.
3 Stoichiometric defects make the crystals bad electrical conductors.
4 Frenkel defect decreases the density.
CHXII01:THE SOLID STATE

318836 Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion :
In a particular point defect, an ionic solid is electrically neutral, even if few of its cations are missing from its unit cells.
Reason :
In an ionic solid, Frenkel defect arises due to dislocation of cation from its lattice site to interstitial site, maintaining overall electrical neutrality.

1 Both (A) and (R) are correct and (R) is the correct explanation of the Assertion.
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct.
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
NEET - 2022
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CHXII01:THE SOLID STATE

318833 An analysis shows that the oxide of nickel consists of nickel ion with \(96 \%\) ions having d \({ }^{8}\) configuration and \(4 \%\) having \(\mathrm{d}^{7}\) configuration. Which one of the following represents the formula of the oxide best ?

1 \(\mathrm{Ni}_{0.98} \mathrm{O}_{0.98}\)
2 \(\mathrm{Ni}_{1.02} \mathrm{O}_{1.02}\)
3 \(\mathrm{Ni}_{1.02} \mathrm{O}_{1.00}\)
4 \(\mathrm{Ni}_{0.98} \mathrm{O}_{1.00}\)
NCERT Exemplar
CHXII01:THE SOLID STATE

318834 Which type of 'defect' has the presence of cations in the interstitial sites?

1 Vacancy defect
2 Frenkel defect
3 metal deficiency defect
4 Schottky defect
CHXII01:THE SOLID STATE

318835 Among the following, the correct statement is

1 Schottky defect is shown by \(\mathrm{ZnS}\) and \(\mathrm{AgI}\)
2 Frenkel defect increases the dielectric constant of the crystals.
3 Stoichiometric defects make the crystals bad electrical conductors.
4 Frenkel defect decreases the density.
CHXII01:THE SOLID STATE

318836 Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion :
In a particular point defect, an ionic solid is electrically neutral, even if few of its cations are missing from its unit cells.
Reason :
In an ionic solid, Frenkel defect arises due to dislocation of cation from its lattice site to interstitial site, maintaining overall electrical neutrality.

1 Both (A) and (R) are correct and (R) is the correct explanation of the Assertion.
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct.
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
NEET - 2022
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CHXII01:THE SOLID STATE

318833 An analysis shows that the oxide of nickel consists of nickel ion with \(96 \%\) ions having d \({ }^{8}\) configuration and \(4 \%\) having \(\mathrm{d}^{7}\) configuration. Which one of the following represents the formula of the oxide best ?

1 \(\mathrm{Ni}_{0.98} \mathrm{O}_{0.98}\)
2 \(\mathrm{Ni}_{1.02} \mathrm{O}_{1.02}\)
3 \(\mathrm{Ni}_{1.02} \mathrm{O}_{1.00}\)
4 \(\mathrm{Ni}_{0.98} \mathrm{O}_{1.00}\)
NCERT Exemplar
CHXII01:THE SOLID STATE

318834 Which type of 'defect' has the presence of cations in the interstitial sites?

1 Vacancy defect
2 Frenkel defect
3 metal deficiency defect
4 Schottky defect
CHXII01:THE SOLID STATE

318835 Among the following, the correct statement is

1 Schottky defect is shown by \(\mathrm{ZnS}\) and \(\mathrm{AgI}\)
2 Frenkel defect increases the dielectric constant of the crystals.
3 Stoichiometric defects make the crystals bad electrical conductors.
4 Frenkel defect decreases the density.
CHXII01:THE SOLID STATE

318836 Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion :
In a particular point defect, an ionic solid is electrically neutral, even if few of its cations are missing from its unit cells.
Reason :
In an ionic solid, Frenkel defect arises due to dislocation of cation from its lattice site to interstitial site, maintaining overall electrical neutrality.

1 Both (A) and (R) are correct and (R) is the correct explanation of the Assertion.
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct.
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
NEET - 2022