318943
The correct set of characteristics of \(\mathrm{ZnS}\) crystal is
1 Coordination number (4:4); ccp; \(Z n^{2+}\) ions in the alternate tetrahedral voids
2 Coordination number (6:6); hcp; \(\mathrm{Zn}^{2+}\) ions in all tetrahedral voids
3 Coordination number (6:4); hcp; \(\mathrm{Zn}^{2+}\) ions in all octahedral voids
4 Coordination number (4:4); ccp; \(\mathrm{Zn}^{2+}\) ions in all tetrahedral voids
Explanation:
\(\mathrm{ZnS}\) has ccp structure (fcc) in which \(S^{2-}\) ions occupy corners and face centres and \(\mathrm{Zn}^{2+}\) ions are present in alternate tetrahedral voids. Further, each \(\mathrm{Zn}^{2+}\) ion is surrounded tetrahedrally by \(4 S^{2-}\) ions and vice-versa.
CHXII01:THE SOLID STATE
318944
Coordination positions of " \(\mathrm{C}\) " in \(\mathrm{Be}_{2} C_{3}\) whose structure is correlated with that of \(\mathrm{CaF}_{2}\), is
1 2
2 4
3 6
4 8
Explanation:
In \(B e_{2} C_{3} ; B e^{+2}=\) In tetrahedral voids \(C_{3}^{2-}=\) In FCC arrangement (Lattice point at corner + at each face centre) Therefore, coordination number of \(B e^{+}=4\) And coordination number of \(C_{3}^{2-}=8\)
CHXII01:THE SOLID STATE
318945
In which of the following crystals, alternate tetrahedral voids are occupied?
1 \(\mathrm{ZnS}\)
2 \(\mathrm{Na}_{2} \mathrm{O}\)
3 \(\mathrm{NaCl}\)
4 \(\mathrm{CaF}_{2}\)
Explanation:
In \(\mathrm{ZnS}\) structure, sulphide ions occupy all fcc lattice points while \(\mathrm{Zn}^{+2}\) ions are present in alternate tetrahedral voids.
CHXII01:THE SOLID STATE
318946
In an antifluorite structure, cations occupy
1 Octahedral voids
2 Centre of the cube
3 Tetrahedral voids
4 Corners of the cube.
Explanation:
In antifluorite structure, oxide ions are present in fcc packing and metal ions occupy all the tetrahedral voids.
318943
The correct set of characteristics of \(\mathrm{ZnS}\) crystal is
1 Coordination number (4:4); ccp; \(Z n^{2+}\) ions in the alternate tetrahedral voids
2 Coordination number (6:6); hcp; \(\mathrm{Zn}^{2+}\) ions in all tetrahedral voids
3 Coordination number (6:4); hcp; \(\mathrm{Zn}^{2+}\) ions in all octahedral voids
4 Coordination number (4:4); ccp; \(\mathrm{Zn}^{2+}\) ions in all tetrahedral voids
Explanation:
\(\mathrm{ZnS}\) has ccp structure (fcc) in which \(S^{2-}\) ions occupy corners and face centres and \(\mathrm{Zn}^{2+}\) ions are present in alternate tetrahedral voids. Further, each \(\mathrm{Zn}^{2+}\) ion is surrounded tetrahedrally by \(4 S^{2-}\) ions and vice-versa.
CHXII01:THE SOLID STATE
318944
Coordination positions of " \(\mathrm{C}\) " in \(\mathrm{Be}_{2} C_{3}\) whose structure is correlated with that of \(\mathrm{CaF}_{2}\), is
1 2
2 4
3 6
4 8
Explanation:
In \(B e_{2} C_{3} ; B e^{+2}=\) In tetrahedral voids \(C_{3}^{2-}=\) In FCC arrangement (Lattice point at corner + at each face centre) Therefore, coordination number of \(B e^{+}=4\) And coordination number of \(C_{3}^{2-}=8\)
CHXII01:THE SOLID STATE
318945
In which of the following crystals, alternate tetrahedral voids are occupied?
1 \(\mathrm{ZnS}\)
2 \(\mathrm{Na}_{2} \mathrm{O}\)
3 \(\mathrm{NaCl}\)
4 \(\mathrm{CaF}_{2}\)
Explanation:
In \(\mathrm{ZnS}\) structure, sulphide ions occupy all fcc lattice points while \(\mathrm{Zn}^{+2}\) ions are present in alternate tetrahedral voids.
CHXII01:THE SOLID STATE
318946
In an antifluorite structure, cations occupy
1 Octahedral voids
2 Centre of the cube
3 Tetrahedral voids
4 Corners of the cube.
Explanation:
In antifluorite structure, oxide ions are present in fcc packing and metal ions occupy all the tetrahedral voids.
318943
The correct set of characteristics of \(\mathrm{ZnS}\) crystal is
1 Coordination number (4:4); ccp; \(Z n^{2+}\) ions in the alternate tetrahedral voids
2 Coordination number (6:6); hcp; \(\mathrm{Zn}^{2+}\) ions in all tetrahedral voids
3 Coordination number (6:4); hcp; \(\mathrm{Zn}^{2+}\) ions in all octahedral voids
4 Coordination number (4:4); ccp; \(\mathrm{Zn}^{2+}\) ions in all tetrahedral voids
Explanation:
\(\mathrm{ZnS}\) has ccp structure (fcc) in which \(S^{2-}\) ions occupy corners and face centres and \(\mathrm{Zn}^{2+}\) ions are present in alternate tetrahedral voids. Further, each \(\mathrm{Zn}^{2+}\) ion is surrounded tetrahedrally by \(4 S^{2-}\) ions and vice-versa.
CHXII01:THE SOLID STATE
318944
Coordination positions of " \(\mathrm{C}\) " in \(\mathrm{Be}_{2} C_{3}\) whose structure is correlated with that of \(\mathrm{CaF}_{2}\), is
1 2
2 4
3 6
4 8
Explanation:
In \(B e_{2} C_{3} ; B e^{+2}=\) In tetrahedral voids \(C_{3}^{2-}=\) In FCC arrangement (Lattice point at corner + at each face centre) Therefore, coordination number of \(B e^{+}=4\) And coordination number of \(C_{3}^{2-}=8\)
CHXII01:THE SOLID STATE
318945
In which of the following crystals, alternate tetrahedral voids are occupied?
1 \(\mathrm{ZnS}\)
2 \(\mathrm{Na}_{2} \mathrm{O}\)
3 \(\mathrm{NaCl}\)
4 \(\mathrm{CaF}_{2}\)
Explanation:
In \(\mathrm{ZnS}\) structure, sulphide ions occupy all fcc lattice points while \(\mathrm{Zn}^{+2}\) ions are present in alternate tetrahedral voids.
CHXII01:THE SOLID STATE
318946
In an antifluorite structure, cations occupy
1 Octahedral voids
2 Centre of the cube
3 Tetrahedral voids
4 Corners of the cube.
Explanation:
In antifluorite structure, oxide ions are present in fcc packing and metal ions occupy all the tetrahedral voids.
318943
The correct set of characteristics of \(\mathrm{ZnS}\) crystal is
1 Coordination number (4:4); ccp; \(Z n^{2+}\) ions in the alternate tetrahedral voids
2 Coordination number (6:6); hcp; \(\mathrm{Zn}^{2+}\) ions in all tetrahedral voids
3 Coordination number (6:4); hcp; \(\mathrm{Zn}^{2+}\) ions in all octahedral voids
4 Coordination number (4:4); ccp; \(\mathrm{Zn}^{2+}\) ions in all tetrahedral voids
Explanation:
\(\mathrm{ZnS}\) has ccp structure (fcc) in which \(S^{2-}\) ions occupy corners and face centres and \(\mathrm{Zn}^{2+}\) ions are present in alternate tetrahedral voids. Further, each \(\mathrm{Zn}^{2+}\) ion is surrounded tetrahedrally by \(4 S^{2-}\) ions and vice-versa.
CHXII01:THE SOLID STATE
318944
Coordination positions of " \(\mathrm{C}\) " in \(\mathrm{Be}_{2} C_{3}\) whose structure is correlated with that of \(\mathrm{CaF}_{2}\), is
1 2
2 4
3 6
4 8
Explanation:
In \(B e_{2} C_{3} ; B e^{+2}=\) In tetrahedral voids \(C_{3}^{2-}=\) In FCC arrangement (Lattice point at corner + at each face centre) Therefore, coordination number of \(B e^{+}=4\) And coordination number of \(C_{3}^{2-}=8\)
CHXII01:THE SOLID STATE
318945
In which of the following crystals, alternate tetrahedral voids are occupied?
1 \(\mathrm{ZnS}\)
2 \(\mathrm{Na}_{2} \mathrm{O}\)
3 \(\mathrm{NaCl}\)
4 \(\mathrm{CaF}_{2}\)
Explanation:
In \(\mathrm{ZnS}\) structure, sulphide ions occupy all fcc lattice points while \(\mathrm{Zn}^{+2}\) ions are present in alternate tetrahedral voids.
CHXII01:THE SOLID STATE
318946
In an antifluorite structure, cations occupy
1 Octahedral voids
2 Centre of the cube
3 Tetrahedral voids
4 Corners of the cube.
Explanation:
In antifluorite structure, oxide ions are present in fcc packing and metal ions occupy all the tetrahedral voids.
