31906
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells
1 \(8\)
2 \(4\)
3 \(2\)
4 \(6\)
Explanation:
As the F.C.C unit cells consists of 6 faces so it is equally shared by 6 unit cells.
The Solid State
31907
The maximum radius of sphere that can be fitted in the octahedral hole of cubical closed packing of sphere of radius \(r\) is .............. \(\mathrm{r}\)
1 \(0.732\)
2 \(0.414 \)
3 \(0.225\)
4 \(0.155\)
Explanation:
For octahedral voids, \(r+r_{1}=2 r \cdot \frac{1}{\sqrt{2}}\) \(\Longrightarrow \frac{r_{1}}{r}=\sqrt{2} r\) \(\Longrightarrow \frac{r_{1}}{r}=\sqrt{2}-1=0.414\) \(\Longrightarrow r_{1}=0.414 r\)
The Solid State
31908
The unit cell of a \(NaCl\) lattice
1 Is body centred cube
2 Has \(3N{a^ + }\)ions
3 Has \(4NaCl\) units
4 Is electrically charged
Explanation:
(c) Each unit cell of \(NaCl\) contains \(4\,NaCl\) units.
The Solid State
31909
For tetrahedral coordination number, the radius ratio \(\frac{{{r_{{c^ + }}}}}{{{r_{{a^ - }}}}}\) is
1 \(0.732 - 1.000\)
2 \(0.414 - 0.732\)
3 \(0.225 - 0.414\)
4 \(0.155 - 0.225\)
Explanation:
(c)For tetrahedral arrangement co-ordination number is \(4 \) and radius ratio \(({r_ + }/{r_ - })\) is \(0.225 - 0.414\).
31906
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells
1 \(8\)
2 \(4\)
3 \(2\)
4 \(6\)
Explanation:
As the F.C.C unit cells consists of 6 faces so it is equally shared by 6 unit cells.
The Solid State
31907
The maximum radius of sphere that can be fitted in the octahedral hole of cubical closed packing of sphere of radius \(r\) is .............. \(\mathrm{r}\)
1 \(0.732\)
2 \(0.414 \)
3 \(0.225\)
4 \(0.155\)
Explanation:
For octahedral voids, \(r+r_{1}=2 r \cdot \frac{1}{\sqrt{2}}\) \(\Longrightarrow \frac{r_{1}}{r}=\sqrt{2} r\) \(\Longrightarrow \frac{r_{1}}{r}=\sqrt{2}-1=0.414\) \(\Longrightarrow r_{1}=0.414 r\)
The Solid State
31908
The unit cell of a \(NaCl\) lattice
1 Is body centred cube
2 Has \(3N{a^ + }\)ions
3 Has \(4NaCl\) units
4 Is electrically charged
Explanation:
(c) Each unit cell of \(NaCl\) contains \(4\,NaCl\) units.
The Solid State
31909
For tetrahedral coordination number, the radius ratio \(\frac{{{r_{{c^ + }}}}}{{{r_{{a^ - }}}}}\) is
1 \(0.732 - 1.000\)
2 \(0.414 - 0.732\)
3 \(0.225 - 0.414\)
4 \(0.155 - 0.225\)
Explanation:
(c)For tetrahedral arrangement co-ordination number is \(4 \) and radius ratio \(({r_ + }/{r_ - })\) is \(0.225 - 0.414\).
31906
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells
1 \(8\)
2 \(4\)
3 \(2\)
4 \(6\)
Explanation:
As the F.C.C unit cells consists of 6 faces so it is equally shared by 6 unit cells.
The Solid State
31907
The maximum radius of sphere that can be fitted in the octahedral hole of cubical closed packing of sphere of radius \(r\) is .............. \(\mathrm{r}\)
1 \(0.732\)
2 \(0.414 \)
3 \(0.225\)
4 \(0.155\)
Explanation:
For octahedral voids, \(r+r_{1}=2 r \cdot \frac{1}{\sqrt{2}}\) \(\Longrightarrow \frac{r_{1}}{r}=\sqrt{2} r\) \(\Longrightarrow \frac{r_{1}}{r}=\sqrt{2}-1=0.414\) \(\Longrightarrow r_{1}=0.414 r\)
The Solid State
31908
The unit cell of a \(NaCl\) lattice
1 Is body centred cube
2 Has \(3N{a^ + }\)ions
3 Has \(4NaCl\) units
4 Is electrically charged
Explanation:
(c) Each unit cell of \(NaCl\) contains \(4\,NaCl\) units.
The Solid State
31909
For tetrahedral coordination number, the radius ratio \(\frac{{{r_{{c^ + }}}}}{{{r_{{a^ - }}}}}\) is
1 \(0.732 - 1.000\)
2 \(0.414 - 0.732\)
3 \(0.225 - 0.414\)
4 \(0.155 - 0.225\)
Explanation:
(c)For tetrahedral arrangement co-ordination number is \(4 \) and radius ratio \(({r_ + }/{r_ - })\) is \(0.225 - 0.414\).
31906
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells
1 \(8\)
2 \(4\)
3 \(2\)
4 \(6\)
Explanation:
As the F.C.C unit cells consists of 6 faces so it is equally shared by 6 unit cells.
The Solid State
31907
The maximum radius of sphere that can be fitted in the octahedral hole of cubical closed packing of sphere of radius \(r\) is .............. \(\mathrm{r}\)
1 \(0.732\)
2 \(0.414 \)
3 \(0.225\)
4 \(0.155\)
Explanation:
For octahedral voids, \(r+r_{1}=2 r \cdot \frac{1}{\sqrt{2}}\) \(\Longrightarrow \frac{r_{1}}{r}=\sqrt{2} r\) \(\Longrightarrow \frac{r_{1}}{r}=\sqrt{2}-1=0.414\) \(\Longrightarrow r_{1}=0.414 r\)
The Solid State
31908
The unit cell of a \(NaCl\) lattice
1 Is body centred cube
2 Has \(3N{a^ + }\)ions
3 Has \(4NaCl\) units
4 Is electrically charged
Explanation:
(c) Each unit cell of \(NaCl\) contains \(4\,NaCl\) units.
The Solid State
31909
For tetrahedral coordination number, the radius ratio \(\frac{{{r_{{c^ + }}}}}{{{r_{{a^ - }}}}}\) is
1 \(0.732 - 1.000\)
2 \(0.414 - 0.732\)
3 \(0.225 - 0.414\)
4 \(0.155 - 0.225\)
Explanation:
(c)For tetrahedral arrangement co-ordination number is \(4 \) and radius ratio \(({r_ + }/{r_ - })\) is \(0.225 - 0.414\).
