318938
\(A B\) crystallizes in a body centred cubic lattices with edge length ' \(a\) ' equal to \(387 \mathrm{pm}\). The distance between two oppositely charged ions in the lattice is:
1 \(335 \mathrm{pm}\)
2 \(250 \mathrm{pm}\)
3 \(200 \mathrm{pm}\)
4 \(300 \mathrm{pm}\)
Explanation:
For bcc lattice, body diagonal \(=a \sqrt{3}\). The distance between the two oppositely charged ions \[ \begin{aligned} & =\dfrac{a}{2} \sqrt{3} \\ & =\dfrac{387 \times 1.732}{2}=335 \mathrm{pm} \end{aligned} \]
CHXII01:THE SOLID STATE
318939
Select the incorrect statement for \(\mathrm{CsCl}\) crystal.
1 The structure changed to \(\mathrm{NaCl}\) at \(760 \mathrm{~K}\)
2 Co-ordination no. for \(\mathrm{Cs}^{+}\)and \(\mathrm{Cl}^{-}\)is 6
3 \(\mathrm{Cl}^{-}\)ions are present at cubic sites
The co-ordination number of \(\mathrm{CsCl}\) is 8 .
CHXII01:THE SOLID STATE
318940
In normal spinel structure there is a closed packed array of \(O^{2-}\) ions. The trivalent cations are present in
1 \(50 \%\) of octahedral voids
2 \(12.5 \%\) of tetrahedral voids
3 \(25 \%\) of octahedral voids
4 \(75 \%\) of octahedral voids
Explanation:
Normal spinel has arrangement in which \(\mathrm{O}^{2-}\) ion form FCC packing and \({\rm{1/}}{{\rm{8}}^{{\rm{th}}}}\) th of tetradehral voids are occupied by divalent metal ion \(\left(\mathrm{A}^{+}\right)\)and half of the octahedral voids are occupied by trivalent metal ion \(\left(\mathrm{B}^{3+}\right)\).
CHXII01:THE SOLID STATE
318941
Which of the following statements is incorrect?
1 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13 .
2 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 27.
3 A unit cell of an ionic crystal shares some of its ions with other unit cells.
4 The length of the unit cell in \(\mathrm{NaCl}\) is 552 \(\operatorname{pm}\left(\mathrm{r}_{\mathrm{Na}}^{+}=95 \mathrm{pm} ; \mathrm{r}_{\mathrm{Cl}}^{-}=181 \mathrm{pm}\right)\)
Explanation:
The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13.
CHXII01:THE SOLID STATE
318942
In which of the following structures coordination number for cations and anions in the packed structure will be same?
1 \(\mathrm{S}^{2-}\) ions form fcc lattice and \(\mathrm{Zn}^{2+}\) ions go into alternate tetrahedral voids of the unit cell
2 \(\mathrm{O}^{2-}\) ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all the eight tetrahedral voids of the unit cell
3 \(\mathrm{Ca}^{2+}\) ions form fcc lattice and \(F^{-}\)ions occupy all the eight tetrahedral voids of the unit cell
4 \(\mathrm{Cl}^{-}\)ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all octahedral voids of the unit cell
Explanation:
\(\mathrm{NaCl}\) crystal have rock salt structure having fcc lattice in which \(\mathrm{Cl}^{-}\)ions are present at fcc lattice points and face centre and \(\mathrm{Na}^{+}\) occupies all the octahedral void of given unit cell. Where, coordination number of \(\mathrm{Na}^{+}=6\) coordination number of \(\mathrm{Cl}^{-}=6\)
318938
\(A B\) crystallizes in a body centred cubic lattices with edge length ' \(a\) ' equal to \(387 \mathrm{pm}\). The distance between two oppositely charged ions in the lattice is:
1 \(335 \mathrm{pm}\)
2 \(250 \mathrm{pm}\)
3 \(200 \mathrm{pm}\)
4 \(300 \mathrm{pm}\)
Explanation:
For bcc lattice, body diagonal \(=a \sqrt{3}\). The distance between the two oppositely charged ions \[ \begin{aligned} & =\dfrac{a}{2} \sqrt{3} \\ & =\dfrac{387 \times 1.732}{2}=335 \mathrm{pm} \end{aligned} \]
CHXII01:THE SOLID STATE
318939
Select the incorrect statement for \(\mathrm{CsCl}\) crystal.
1 The structure changed to \(\mathrm{NaCl}\) at \(760 \mathrm{~K}\)
2 Co-ordination no. for \(\mathrm{Cs}^{+}\)and \(\mathrm{Cl}^{-}\)is 6
3 \(\mathrm{Cl}^{-}\)ions are present at cubic sites
The co-ordination number of \(\mathrm{CsCl}\) is 8 .
CHXII01:THE SOLID STATE
318940
In normal spinel structure there is a closed packed array of \(O^{2-}\) ions. The trivalent cations are present in
1 \(50 \%\) of octahedral voids
2 \(12.5 \%\) of tetrahedral voids
3 \(25 \%\) of octahedral voids
4 \(75 \%\) of octahedral voids
Explanation:
Normal spinel has arrangement in which \(\mathrm{O}^{2-}\) ion form FCC packing and \({\rm{1/}}{{\rm{8}}^{{\rm{th}}}}\) th of tetradehral voids are occupied by divalent metal ion \(\left(\mathrm{A}^{+}\right)\)and half of the octahedral voids are occupied by trivalent metal ion \(\left(\mathrm{B}^{3+}\right)\).
CHXII01:THE SOLID STATE
318941
Which of the following statements is incorrect?
1 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13 .
2 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 27.
3 A unit cell of an ionic crystal shares some of its ions with other unit cells.
4 The length of the unit cell in \(\mathrm{NaCl}\) is 552 \(\operatorname{pm}\left(\mathrm{r}_{\mathrm{Na}}^{+}=95 \mathrm{pm} ; \mathrm{r}_{\mathrm{Cl}}^{-}=181 \mathrm{pm}\right)\)
Explanation:
The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13.
CHXII01:THE SOLID STATE
318942
In which of the following structures coordination number for cations and anions in the packed structure will be same?
1 \(\mathrm{S}^{2-}\) ions form fcc lattice and \(\mathrm{Zn}^{2+}\) ions go into alternate tetrahedral voids of the unit cell
2 \(\mathrm{O}^{2-}\) ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all the eight tetrahedral voids of the unit cell
3 \(\mathrm{Ca}^{2+}\) ions form fcc lattice and \(F^{-}\)ions occupy all the eight tetrahedral voids of the unit cell
4 \(\mathrm{Cl}^{-}\)ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all octahedral voids of the unit cell
Explanation:
\(\mathrm{NaCl}\) crystal have rock salt structure having fcc lattice in which \(\mathrm{Cl}^{-}\)ions are present at fcc lattice points and face centre and \(\mathrm{Na}^{+}\) occupies all the octahedral void of given unit cell. Where, coordination number of \(\mathrm{Na}^{+}=6\) coordination number of \(\mathrm{Cl}^{-}=6\)
318938
\(A B\) crystallizes in a body centred cubic lattices with edge length ' \(a\) ' equal to \(387 \mathrm{pm}\). The distance between two oppositely charged ions in the lattice is:
1 \(335 \mathrm{pm}\)
2 \(250 \mathrm{pm}\)
3 \(200 \mathrm{pm}\)
4 \(300 \mathrm{pm}\)
Explanation:
For bcc lattice, body diagonal \(=a \sqrt{3}\). The distance between the two oppositely charged ions \[ \begin{aligned} & =\dfrac{a}{2} \sqrt{3} \\ & =\dfrac{387 \times 1.732}{2}=335 \mathrm{pm} \end{aligned} \]
CHXII01:THE SOLID STATE
318939
Select the incorrect statement for \(\mathrm{CsCl}\) crystal.
1 The structure changed to \(\mathrm{NaCl}\) at \(760 \mathrm{~K}\)
2 Co-ordination no. for \(\mathrm{Cs}^{+}\)and \(\mathrm{Cl}^{-}\)is 6
3 \(\mathrm{Cl}^{-}\)ions are present at cubic sites
The co-ordination number of \(\mathrm{CsCl}\) is 8 .
CHXII01:THE SOLID STATE
318940
In normal spinel structure there is a closed packed array of \(O^{2-}\) ions. The trivalent cations are present in
1 \(50 \%\) of octahedral voids
2 \(12.5 \%\) of tetrahedral voids
3 \(25 \%\) of octahedral voids
4 \(75 \%\) of octahedral voids
Explanation:
Normal spinel has arrangement in which \(\mathrm{O}^{2-}\) ion form FCC packing and \({\rm{1/}}{{\rm{8}}^{{\rm{th}}}}\) th of tetradehral voids are occupied by divalent metal ion \(\left(\mathrm{A}^{+}\right)\)and half of the octahedral voids are occupied by trivalent metal ion \(\left(\mathrm{B}^{3+}\right)\).
CHXII01:THE SOLID STATE
318941
Which of the following statements is incorrect?
1 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13 .
2 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 27.
3 A unit cell of an ionic crystal shares some of its ions with other unit cells.
4 The length of the unit cell in \(\mathrm{NaCl}\) is 552 \(\operatorname{pm}\left(\mathrm{r}_{\mathrm{Na}}^{+}=95 \mathrm{pm} ; \mathrm{r}_{\mathrm{Cl}}^{-}=181 \mathrm{pm}\right)\)
Explanation:
The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13.
CHXII01:THE SOLID STATE
318942
In which of the following structures coordination number for cations and anions in the packed structure will be same?
1 \(\mathrm{S}^{2-}\) ions form fcc lattice and \(\mathrm{Zn}^{2+}\) ions go into alternate tetrahedral voids of the unit cell
2 \(\mathrm{O}^{2-}\) ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all the eight tetrahedral voids of the unit cell
3 \(\mathrm{Ca}^{2+}\) ions form fcc lattice and \(F^{-}\)ions occupy all the eight tetrahedral voids of the unit cell
4 \(\mathrm{Cl}^{-}\)ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all octahedral voids of the unit cell
Explanation:
\(\mathrm{NaCl}\) crystal have rock salt structure having fcc lattice in which \(\mathrm{Cl}^{-}\)ions are present at fcc lattice points and face centre and \(\mathrm{Na}^{+}\) occupies all the octahedral void of given unit cell. Where, coordination number of \(\mathrm{Na}^{+}=6\) coordination number of \(\mathrm{Cl}^{-}=6\)
318938
\(A B\) crystallizes in a body centred cubic lattices with edge length ' \(a\) ' equal to \(387 \mathrm{pm}\). The distance between two oppositely charged ions in the lattice is:
1 \(335 \mathrm{pm}\)
2 \(250 \mathrm{pm}\)
3 \(200 \mathrm{pm}\)
4 \(300 \mathrm{pm}\)
Explanation:
For bcc lattice, body diagonal \(=a \sqrt{3}\). The distance between the two oppositely charged ions \[ \begin{aligned} & =\dfrac{a}{2} \sqrt{3} \\ & =\dfrac{387 \times 1.732}{2}=335 \mathrm{pm} \end{aligned} \]
CHXII01:THE SOLID STATE
318939
Select the incorrect statement for \(\mathrm{CsCl}\) crystal.
1 The structure changed to \(\mathrm{NaCl}\) at \(760 \mathrm{~K}\)
2 Co-ordination no. for \(\mathrm{Cs}^{+}\)and \(\mathrm{Cl}^{-}\)is 6
3 \(\mathrm{Cl}^{-}\)ions are present at cubic sites
The co-ordination number of \(\mathrm{CsCl}\) is 8 .
CHXII01:THE SOLID STATE
318940
In normal spinel structure there is a closed packed array of \(O^{2-}\) ions. The trivalent cations are present in
1 \(50 \%\) of octahedral voids
2 \(12.5 \%\) of tetrahedral voids
3 \(25 \%\) of octahedral voids
4 \(75 \%\) of octahedral voids
Explanation:
Normal spinel has arrangement in which \(\mathrm{O}^{2-}\) ion form FCC packing and \({\rm{1/}}{{\rm{8}}^{{\rm{th}}}}\) th of tetradehral voids are occupied by divalent metal ion \(\left(\mathrm{A}^{+}\right)\)and half of the octahedral voids are occupied by trivalent metal ion \(\left(\mathrm{B}^{3+}\right)\).
CHXII01:THE SOLID STATE
318941
Which of the following statements is incorrect?
1 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13 .
2 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 27.
3 A unit cell of an ionic crystal shares some of its ions with other unit cells.
4 The length of the unit cell in \(\mathrm{NaCl}\) is 552 \(\operatorname{pm}\left(\mathrm{r}_{\mathrm{Na}}^{+}=95 \mathrm{pm} ; \mathrm{r}_{\mathrm{Cl}}^{-}=181 \mathrm{pm}\right)\)
Explanation:
The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13.
CHXII01:THE SOLID STATE
318942
In which of the following structures coordination number for cations and anions in the packed structure will be same?
1 \(\mathrm{S}^{2-}\) ions form fcc lattice and \(\mathrm{Zn}^{2+}\) ions go into alternate tetrahedral voids of the unit cell
2 \(\mathrm{O}^{2-}\) ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all the eight tetrahedral voids of the unit cell
3 \(\mathrm{Ca}^{2+}\) ions form fcc lattice and \(F^{-}\)ions occupy all the eight tetrahedral voids of the unit cell
4 \(\mathrm{Cl}^{-}\)ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all octahedral voids of the unit cell
Explanation:
\(\mathrm{NaCl}\) crystal have rock salt structure having fcc lattice in which \(\mathrm{Cl}^{-}\)ions are present at fcc lattice points and face centre and \(\mathrm{Na}^{+}\) occupies all the octahedral void of given unit cell. Where, coordination number of \(\mathrm{Na}^{+}=6\) coordination number of \(\mathrm{Cl}^{-}=6\)
318938
\(A B\) crystallizes in a body centred cubic lattices with edge length ' \(a\) ' equal to \(387 \mathrm{pm}\). The distance between two oppositely charged ions in the lattice is:
1 \(335 \mathrm{pm}\)
2 \(250 \mathrm{pm}\)
3 \(200 \mathrm{pm}\)
4 \(300 \mathrm{pm}\)
Explanation:
For bcc lattice, body diagonal \(=a \sqrt{3}\). The distance between the two oppositely charged ions \[ \begin{aligned} & =\dfrac{a}{2} \sqrt{3} \\ & =\dfrac{387 \times 1.732}{2}=335 \mathrm{pm} \end{aligned} \]
CHXII01:THE SOLID STATE
318939
Select the incorrect statement for \(\mathrm{CsCl}\) crystal.
1 The structure changed to \(\mathrm{NaCl}\) at \(760 \mathrm{~K}\)
2 Co-ordination no. for \(\mathrm{Cs}^{+}\)and \(\mathrm{Cl}^{-}\)is 6
3 \(\mathrm{Cl}^{-}\)ions are present at cubic sites
The co-ordination number of \(\mathrm{CsCl}\) is 8 .
CHXII01:THE SOLID STATE
318940
In normal spinel structure there is a closed packed array of \(O^{2-}\) ions. The trivalent cations are present in
1 \(50 \%\) of octahedral voids
2 \(12.5 \%\) of tetrahedral voids
3 \(25 \%\) of octahedral voids
4 \(75 \%\) of octahedral voids
Explanation:
Normal spinel has arrangement in which \(\mathrm{O}^{2-}\) ion form FCC packing and \({\rm{1/}}{{\rm{8}}^{{\rm{th}}}}\) th of tetradehral voids are occupied by divalent metal ion \(\left(\mathrm{A}^{+}\right)\)and half of the octahedral voids are occupied by trivalent metal ion \(\left(\mathrm{B}^{3+}\right)\).
CHXII01:THE SOLID STATE
318941
Which of the following statements is incorrect?
1 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13 .
2 The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 27.
3 A unit cell of an ionic crystal shares some of its ions with other unit cells.
4 The length of the unit cell in \(\mathrm{NaCl}\) is 552 \(\operatorname{pm}\left(\mathrm{r}_{\mathrm{Na}}^{+}=95 \mathrm{pm} ; \mathrm{r}_{\mathrm{Cl}}^{-}=181 \mathrm{pm}\right)\)
Explanation:
The number of \(\mathrm{Na}^{+}\)ions filling all octahedral voids in \(\mathrm{NaCl}\) structure are 13.
CHXII01:THE SOLID STATE
318942
In which of the following structures coordination number for cations and anions in the packed structure will be same?
1 \(\mathrm{S}^{2-}\) ions form fcc lattice and \(\mathrm{Zn}^{2+}\) ions go into alternate tetrahedral voids of the unit cell
2 \(\mathrm{O}^{2-}\) ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all the eight tetrahedral voids of the unit cell
3 \(\mathrm{Ca}^{2+}\) ions form fcc lattice and \(F^{-}\)ions occupy all the eight tetrahedral voids of the unit cell
4 \(\mathrm{Cl}^{-}\)ions form fcc lattice and \(\mathrm{Na}^{+}\)ions occupy all octahedral voids of the unit cell
Explanation:
\(\mathrm{NaCl}\) crystal have rock salt structure having fcc lattice in which \(\mathrm{Cl}^{-}\)ions are present at fcc lattice points and face centre and \(\mathrm{Na}^{+}\) occupies all the octahedral void of given unit cell. Where, coordination number of \(\mathrm{Na}^{+}=6\) coordination number of \(\mathrm{Cl}^{-}=6\)
