The correct statement regarding defects in a crystalline solid is:

 1 Schottky defects have no effect on the density of crystalline solids. 2 Frenkel defects decrease the density of crystalline solids. 3 Frenkel defect is a dislocation defect. 4 Frenkel defect is found in halides of alkaline metals.
Subtopic:  Imperfections in Solids & Semiconductors |
78%
From NCERT
NEET - 2015
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The vacant space in the BCC lattice cell is:

1. 26%

2. 48%

3. 23%

4. 32%

Subtopic:  Voids, Radius Ratio & Coordination Number |
81%
From NCERT
NEET - 2015
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A given metal crystallizes out with a cubic structure having an edge length of 361 pm. If there are four metal atoms in one unit cell, the radius of one atom is:

1. 40 pm
2. 127 pm
3. 80 pm
4. 108 pm

Subtopic:  Density & Packing Fraction |
76%
From NCERT
NEET - 2015
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

If a is the length of the side of a cube, the distance between the body-centered atom and one corner atom in the cube will be:

1. $\frac{2}{\sqrt{3}}a$

2. $\frac{4}{\sqrt{3}}a$

3. $\frac{\sqrt{3}}{4}a$

4. $\frac{\sqrt{3}}{2}a$

Subtopic:  Introduction & Crystal System |
65%
From NCERT
AIPMT - 2014
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Structure of a mixed oxide is cubic close-packed (CCP). The cubic unit cell of mixed oxide is composed of oxide ions. One-fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is:

1. A2BO2
2. A2B3O4
3. AB2O2
4. ABO2

Subtopic:  Voids, Radius Ratio & Coordination Number |
69%
From NCERT
AIPMT - 2012
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of the anion (Y) will be:

1. 165.7 pm

2. 175.1 pm

3. 322.5 pm

4. 241.5 pm

Subtopic:  Voids, Radius Ratio & Coordination Number |
57%
AIPMT - 2011
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints