# A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm–3. The molar mass of the metal is: (NA Avogadro's constant = 6.02 × 1023 mol–1) 1. 30 g mol–1 2. 27 g mol–1 3. 20 g mol–1 4. 40 g mol–1

Subtopic:  Density & Packing Fraction |
74%
From NCERT
AIPMT - 2013
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The number of carbon atoms per unit cell of a diamond is:

1. 8

2. 6

3. 1

4. 4

Subtopic:  Introduction & Crystal System |
59%
From NCERT
AIPMT - 2013
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A metal crystallizes with a fcc lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is:

1. 288 pm

2. 408 pm

3. 144 pm

4. 204 pm

Subtopic:  Density & Packing Fraction |
73%
From NCERT
AIPMT - 2012
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The number of octahedral void(s) per atom present in a cubic close-packed structure is:

1. 1

2. 3

3. 2

4. 4

Subtopic:  Voids, Radius Ratio & Coordination Number |
From NCERT
AIPMT - 2012
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AB crystallizes in a body-centered cubic lattice with edge length 'a' equal to 387 pm. The distance between two oppositely charged ions in the lattice is:

1. 335 pm

2. 250 pm

3. 200 pm

4. 300 pm

Subtopic:  Density & Packing Fraction |
70%
From NCERT
AIPMT - 2010
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Sodium has body-centered packing. The distance between the two nearest atoms is 3.7 Å. The lattice parameter is:
1. 6.8 Å
2. 4.3 Å
3. 3.0 Å
4. 8.5 Å
Subtopic:  Density & Packing Fraction |
63%
From NCERT
AIPMT - 2009
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Copper crystallizes in a face-centered cubic lattice with a unit cell length of 361 pm. The radius of the copper atom is:

1. 128 pm

2. 157 pm

3. 181 pm

4. 108 pm

Subtopic:  Voids, Radius Ratio & Coordination Number |
78%
From NCERT
AIPMT - 2009
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If the lattice parameter for a crystalline structure is 3.6 Å, then the atomic radius in fcc crystal is:

1. 1.81 Å

2. 2.10 Å

3. 2.92 Å

4. 1.27 Å

Subtopic:  Density & Packing Fraction |
75%
From NCERT
AIPMT - 2008
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Lithium metal crystallizes in a body-centered cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be:

1. 240.8 pm

2. 151.8 pm

3. 75.5 pm

4. 300.5 pm

Subtopic:  Introduction & Crystal System |
84%
From NCERT
AIPMT - 2009
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Which of the following statements is not correct?
 1 The fraction of the total volume occupied by die atoms in a primitive cell is 0.48 2 Molecular solids are generally volatile 3 The number of carbon atoms in a unit cell of a diamond is 8 4 The number of Bravais lattices in which a crystal can be categorized is 14

Subtopic:  Density & Packing Fraction |
66%
From NCERT
AIPMT - 2008
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