Number of Atoms in a Unit Cell and Formula of the Solids
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CHXII01:THE SOLID STATE

318881 Three elements \({\text{A,}}\,{\text{B}}\) and \({\text{C}}\) crystallise into a cubic solid lattice. Atom \({\text{A}}\) occupy the corners, \({\text{B}}\) atom, the cube centres and \({\text{C}}\) atom, the edge. The formula of the compound is

1 \({\text{ABC}}\)
2 \({\text{AB}}{{\text{C}}_{\text{2}}}\)
3 \({\text{AB}}{{\text{C}}_{\text{3}}}\)
4 \({\text{AB}}{{\text{C}}_{\text{4}}}\)
CHXII01:THE SOLID STATE

318882 A solid has a structure in which ' \(\mathrm{W}\) ' atoms are located at the corners of a cubic lattice, ' \(O\) ' atoms at the centre of edges and ' \(\mathrm{Na}\) ' atoms at the centre of the cube. The formula of the compound is

1 \(\mathrm{NaWO}_{2}\)
2 \(\mathrm{NaWO}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{WO}_{3}\)
4 \(\mathrm{NaWO}_{4}\)
CHXII01:THE SOLID STATE

318883 Unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) (ferrous ferrite) has \(32 \mathrm{O}^{2-}\) ions in the unit cell. Then the unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) has :

1 \(16 \mathrm{Fe}^{2+}\) ions
2 \(8 \mathrm{Fe}^{3+}\) ions
3 \(16 \mathrm{Fe}^{3+}\) ions and \(8 \mathrm{Fe}^{2+}\) ions
4 None of these
CHXII01:THE SOLID STATE

318884 In face-centred cubic lattice, a unit cell is shared equally by how many unit cells?

1 6
2 4
3 2
4 8
CHXII01:THE SOLID STATE

318885 A substance \(A_{X} B_{Y}\) crystallises in a face centred cubic (fcc) lattice in which atoms ' \(A\) ' occupy each corner of the cube and atoms ' \(B\) ' occupy the centres of each face of the cube. Identify the correct composition of the substance \(\mathrm{A}_{\mathrm{X}} \mathrm{B}_{\mathrm{Y}}\) :

1 \(A_{4} B_{3}\)
2 \(A_{3} B\)
3 \(\mathrm{AB}_{3}\)
4 Composition cannot be specified
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CHXII01:THE SOLID STATE

318881 Three elements \({\text{A,}}\,{\text{B}}\) and \({\text{C}}\) crystallise into a cubic solid lattice. Atom \({\text{A}}\) occupy the corners, \({\text{B}}\) atom, the cube centres and \({\text{C}}\) atom, the edge. The formula of the compound is

1 \({\text{ABC}}\)
2 \({\text{AB}}{{\text{C}}_{\text{2}}}\)
3 \({\text{AB}}{{\text{C}}_{\text{3}}}\)
4 \({\text{AB}}{{\text{C}}_{\text{4}}}\)
CHXII01:THE SOLID STATE

318882 A solid has a structure in which ' \(\mathrm{W}\) ' atoms are located at the corners of a cubic lattice, ' \(O\) ' atoms at the centre of edges and ' \(\mathrm{Na}\) ' atoms at the centre of the cube. The formula of the compound is

1 \(\mathrm{NaWO}_{2}\)
2 \(\mathrm{NaWO}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{WO}_{3}\)
4 \(\mathrm{NaWO}_{4}\)
CHXII01:THE SOLID STATE

318883 Unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) (ferrous ferrite) has \(32 \mathrm{O}^{2-}\) ions in the unit cell. Then the unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) has :

1 \(16 \mathrm{Fe}^{2+}\) ions
2 \(8 \mathrm{Fe}^{3+}\) ions
3 \(16 \mathrm{Fe}^{3+}\) ions and \(8 \mathrm{Fe}^{2+}\) ions
4 None of these
CHXII01:THE SOLID STATE

318884 In face-centred cubic lattice, a unit cell is shared equally by how many unit cells?

1 6
2 4
3 2
4 8
CHXII01:THE SOLID STATE

318885 A substance \(A_{X} B_{Y}\) crystallises in a face centred cubic (fcc) lattice in which atoms ' \(A\) ' occupy each corner of the cube and atoms ' \(B\) ' occupy the centres of each face of the cube. Identify the correct composition of the substance \(\mathrm{A}_{\mathrm{X}} \mathrm{B}_{\mathrm{Y}}\) :

1 \(A_{4} B_{3}\)
2 \(A_{3} B\)
3 \(\mathrm{AB}_{3}\)
4 Composition cannot be specified
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CHXII01:THE SOLID STATE

318881 Three elements \({\text{A,}}\,{\text{B}}\) and \({\text{C}}\) crystallise into a cubic solid lattice. Atom \({\text{A}}\) occupy the corners, \({\text{B}}\) atom, the cube centres and \({\text{C}}\) atom, the edge. The formula of the compound is

1 \({\text{ABC}}\)
2 \({\text{AB}}{{\text{C}}_{\text{2}}}\)
3 \({\text{AB}}{{\text{C}}_{\text{3}}}\)
4 \({\text{AB}}{{\text{C}}_{\text{4}}}\)
CHXII01:THE SOLID STATE

318882 A solid has a structure in which ' \(\mathrm{W}\) ' atoms are located at the corners of a cubic lattice, ' \(O\) ' atoms at the centre of edges and ' \(\mathrm{Na}\) ' atoms at the centre of the cube. The formula of the compound is

1 \(\mathrm{NaWO}_{2}\)
2 \(\mathrm{NaWO}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{WO}_{3}\)
4 \(\mathrm{NaWO}_{4}\)
CHXII01:THE SOLID STATE

318883 Unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) (ferrous ferrite) has \(32 \mathrm{O}^{2-}\) ions in the unit cell. Then the unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) has :

1 \(16 \mathrm{Fe}^{2+}\) ions
2 \(8 \mathrm{Fe}^{3+}\) ions
3 \(16 \mathrm{Fe}^{3+}\) ions and \(8 \mathrm{Fe}^{2+}\) ions
4 None of these
CHXII01:THE SOLID STATE

318884 In face-centred cubic lattice, a unit cell is shared equally by how many unit cells?

1 6
2 4
3 2
4 8
CHXII01:THE SOLID STATE

318885 A substance \(A_{X} B_{Y}\) crystallises in a face centred cubic (fcc) lattice in which atoms ' \(A\) ' occupy each corner of the cube and atoms ' \(B\) ' occupy the centres of each face of the cube. Identify the correct composition of the substance \(\mathrm{A}_{\mathrm{X}} \mathrm{B}_{\mathrm{Y}}\) :

1 \(A_{4} B_{3}\)
2 \(A_{3} B\)
3 \(\mathrm{AB}_{3}\)
4 Composition cannot be specified
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CHXII01:THE SOLID STATE

318881 Three elements \({\text{A,}}\,{\text{B}}\) and \({\text{C}}\) crystallise into a cubic solid lattice. Atom \({\text{A}}\) occupy the corners, \({\text{B}}\) atom, the cube centres and \({\text{C}}\) atom, the edge. The formula of the compound is

1 \({\text{ABC}}\)
2 \({\text{AB}}{{\text{C}}_{\text{2}}}\)
3 \({\text{AB}}{{\text{C}}_{\text{3}}}\)
4 \({\text{AB}}{{\text{C}}_{\text{4}}}\)
CHXII01:THE SOLID STATE

318882 A solid has a structure in which ' \(\mathrm{W}\) ' atoms are located at the corners of a cubic lattice, ' \(O\) ' atoms at the centre of edges and ' \(\mathrm{Na}\) ' atoms at the centre of the cube. The formula of the compound is

1 \(\mathrm{NaWO}_{2}\)
2 \(\mathrm{NaWO}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{WO}_{3}\)
4 \(\mathrm{NaWO}_{4}\)
CHXII01:THE SOLID STATE

318883 Unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) (ferrous ferrite) has \(32 \mathrm{O}^{2-}\) ions in the unit cell. Then the unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) has :

1 \(16 \mathrm{Fe}^{2+}\) ions
2 \(8 \mathrm{Fe}^{3+}\) ions
3 \(16 \mathrm{Fe}^{3+}\) ions and \(8 \mathrm{Fe}^{2+}\) ions
4 None of these
CHXII01:THE SOLID STATE

318884 In face-centred cubic lattice, a unit cell is shared equally by how many unit cells?

1 6
2 4
3 2
4 8
CHXII01:THE SOLID STATE

318885 A substance \(A_{X} B_{Y}\) crystallises in a face centred cubic (fcc) lattice in which atoms ' \(A\) ' occupy each corner of the cube and atoms ' \(B\) ' occupy the centres of each face of the cube. Identify the correct composition of the substance \(\mathrm{A}_{\mathrm{X}} \mathrm{B}_{\mathrm{Y}}\) :

1 \(A_{4} B_{3}\)
2 \(A_{3} B\)
3 \(\mathrm{AB}_{3}\)
4 Composition cannot be specified
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CHXII01:THE SOLID STATE

318881 Three elements \({\text{A,}}\,{\text{B}}\) and \({\text{C}}\) crystallise into a cubic solid lattice. Atom \({\text{A}}\) occupy the corners, \({\text{B}}\) atom, the cube centres and \({\text{C}}\) atom, the edge. The formula of the compound is

1 \({\text{ABC}}\)
2 \({\text{AB}}{{\text{C}}_{\text{2}}}\)
3 \({\text{AB}}{{\text{C}}_{\text{3}}}\)
4 \({\text{AB}}{{\text{C}}_{\text{4}}}\)
CHXII01:THE SOLID STATE

318882 A solid has a structure in which ' \(\mathrm{W}\) ' atoms are located at the corners of a cubic lattice, ' \(O\) ' atoms at the centre of edges and ' \(\mathrm{Na}\) ' atoms at the centre of the cube. The formula of the compound is

1 \(\mathrm{NaWO}_{2}\)
2 \(\mathrm{NaWO}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{WO}_{3}\)
4 \(\mathrm{NaWO}_{4}\)
CHXII01:THE SOLID STATE

318883 Unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) (ferrous ferrite) has \(32 \mathrm{O}^{2-}\) ions in the unit cell. Then the unit cell of \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) has :

1 \(16 \mathrm{Fe}^{2+}\) ions
2 \(8 \mathrm{Fe}^{3+}\) ions
3 \(16 \mathrm{Fe}^{3+}\) ions and \(8 \mathrm{Fe}^{2+}\) ions
4 None of these
CHXII01:THE SOLID STATE

318884 In face-centred cubic lattice, a unit cell is shared equally by how many unit cells?

1 6
2 4
3 2
4 8
CHXII01:THE SOLID STATE

318885 A substance \(A_{X} B_{Y}\) crystallises in a face centred cubic (fcc) lattice in which atoms ' \(A\) ' occupy each corner of the cube and atoms ' \(B\) ' occupy the centres of each face of the cube. Identify the correct composition of the substance \(\mathrm{A}_{\mathrm{X}} \mathrm{B}_{\mathrm{Y}}\) :

1 \(A_{4} B_{3}\)
2 \(A_{3} B\)
3 \(\mathrm{AB}_{3}\)
4 Composition cannot be specified