Total volume of atoms present in a face centred cubic unit cell of a metal is ( r is atomic radius):

(1) 20/3 πr3

(2)  24/3 πr3

(3)  12/3 πr3

(4)  16/3 πr3

Subtopic:  Voids, Radius Ratio & Coordination Number |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

A solid has a bcc structure. If the distance of closest approach between the two atoms is 1.73Å . The edge length of the cell is:

(a) 200pm

(b) 32 pm

(c) 142.2 pm

(d) 2pm

Subtopic:  Density & Packing Fraction |
 72%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Which is covalent solid?

(1) Fe2O3

(2) Diamond

(3) Graphite 

(4) All of these

Subtopic:  Introduction & Crystal System |
 89%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

The anions (A) form hexagonal closest packing and atoms (C) occupy only 2/3 of octahedral voids in
it. then the general formula of the compound is-

(1) CA

(2) A2

(3) C2A3

(4) C3A2

Subtopic:  Density & Packing Fraction |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Graphite in an example of-

(1) Ionic solid

(2) Covalent solid

(3) Vander waal's crystal

(4) Metallic crystal

Subtopic:  Introduction & Crystal System |
 95%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Select the correct statement (s)-

(a) The C.N. of cation occupying a tetrahedral hole is 4.

(b) The C.N. of cation occupying a octahedral hole is 6.

(c) In schottky defects, density of the lattice decreases,

(A) a,b

(B) b,c

(C) a,b,c

(D) a,c

Subtopic:  Voids, Radius Ratio & Coordination Number |
 80%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

Which arrangement of electrons leads to anti-ferromagnetism?
(1)  ↑↑↑↑
(2)  ↑↓↑↓
(3) Both (a) and (b)
(4) None of these

Subtopic:  Magnetic Behaviour of an Element/Compound |
 86%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Among the following types of voids. which one is the largest void:-

(A) Triangular system
(B) Tetragonal system
(C) Monoclinic system
(D) Octahedral

Subtopic:  Introduction & Crystal System | Voids, Radius Ratio & Coordination Number | Magnetic Behaviour of an Element/Compound |
 77%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

The ratio of cations to anion in a closed pack tetrahedral is:

(a) 0.714
(b) 0.225
(c) 0.02
(d) none of these

Subtopic:  Voids, Radius Ratio & Coordination Number |
 84%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

The most efficient packing of similar spheres is obtained in 

1. the simple cubic system and the body centered cubic system

2. the simple cubic system and the hexagonal close packed system

3. the face centered cubic system and the hexagonal close packed system

4. the body centered cubic system and the face centered cubic system

Subtopic:  Density & Packing Fraction |
 79%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints