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

318890 Which of the following statement(s) is/are incorrect?
(i) Only \({\rm{1/}}{{\rm{8}}^{{\rm{th}}}}\) portion of an atom located at corner of a cubic unit cell is its neighbouring unit cell.
(ii) Total number of atoms per unit cell for a face centred cubic unit cell is 3 .
(iii) Atom located at the body centre is shared between two adjacent unit cells.

1 (iii) only
2 (ii) only
3 (i) and (ii)
4 (ii) and (iii)
CHXII01:THE SOLID STATE

318891 A compound is formed by cation \(\mathrm{C}\) and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy \(75 \%\) of octahedral voids. The formula of the compound is

1 \(C_{2} A_{3}\)
2 \(C_{3} A_{2}\)
3 \(C_{3} A_{4}\)
4 \(C_{4} A_{3}\)
NEET - 2019
CHXII01:THE SOLID STATE

318892 How many unit cells are present in a cube-shaped ideal crystal of \(\mathrm{NaCl}\) of mass \(1.00 \mathrm{~g}\) ?
[Atomic masses: \(\mathrm{Na}=23, \mathrm{Cl}=35.5\) ]

1 \(2.57 \times 10^{21}\) unit cells
2 \(5.14 \times 10^{21}\) unit cells
3 \(1.28 \times 10^{21}\) unit cells
4 \(1.71 \times 10^{21}\) unit cells
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CHXII01:THE SOLID STATE

318890 Which of the following statement(s) is/are incorrect?
(i) Only \({\rm{1/}}{{\rm{8}}^{{\rm{th}}}}\) portion of an atom located at corner of a cubic unit cell is its neighbouring unit cell.
(ii) Total number of atoms per unit cell for a face centred cubic unit cell is 3 .
(iii) Atom located at the body centre is shared between two adjacent unit cells.

1 (iii) only
2 (ii) only
3 (i) and (ii)
4 (ii) and (iii)
CHXII01:THE SOLID STATE

318891 A compound is formed by cation \(\mathrm{C}\) and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy \(75 \%\) of octahedral voids. The formula of the compound is

1 \(C_{2} A_{3}\)
2 \(C_{3} A_{2}\)
3 \(C_{3} A_{4}\)
4 \(C_{4} A_{3}\)
NEET - 2019
CHXII01:THE SOLID STATE

318892 How many unit cells are present in a cube-shaped ideal crystal of \(\mathrm{NaCl}\) of mass \(1.00 \mathrm{~g}\) ?
[Atomic masses: \(\mathrm{Na}=23, \mathrm{Cl}=35.5\) ]

1 \(2.57 \times 10^{21}\) unit cells
2 \(5.14 \times 10^{21}\) unit cells
3 \(1.28 \times 10^{21}\) unit cells
4 \(1.71 \times 10^{21}\) unit cells
For More Updates join with Us
CHXII01:THE SOLID STATE

318890 Which of the following statement(s) is/are incorrect?
(i) Only \({\rm{1/}}{{\rm{8}}^{{\rm{th}}}}\) portion of an atom located at corner of a cubic unit cell is its neighbouring unit cell.
(ii) Total number of atoms per unit cell for a face centred cubic unit cell is 3 .
(iii) Atom located at the body centre is shared between two adjacent unit cells.

1 (iii) only
2 (ii) only
3 (i) and (ii)
4 (ii) and (iii)
CHXII01:THE SOLID STATE

318891 A compound is formed by cation \(\mathrm{C}\) and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy \(75 \%\) of octahedral voids. The formula of the compound is

1 \(C_{2} A_{3}\)
2 \(C_{3} A_{2}\)
3 \(C_{3} A_{4}\)
4 \(C_{4} A_{3}\)
NEET - 2019
CHXII01:THE SOLID STATE

318892 How many unit cells are present in a cube-shaped ideal crystal of \(\mathrm{NaCl}\) of mass \(1.00 \mathrm{~g}\) ?
[Atomic masses: \(\mathrm{Na}=23, \mathrm{Cl}=35.5\) ]

1 \(2.57 \times 10^{21}\) unit cells
2 \(5.14 \times 10^{21}\) unit cells
3 \(1.28 \times 10^{21}\) unit cells
4 \(1.71 \times 10^{21}\) unit cells
NEET DIGITAL LIBRARY