Solid State Chemistry MCQ Practice Tests: Free Quiz

By Exam Success / 25-12-2025

Test your Chemistry preparation with the Chemistry Solid State Online Mock Test, featuring 20 carefully designed multiple-choice questions based on important concepts, formulas, calculations, and applications from the Solid State chapter. You will have 30 minutes to complete the test, making it an effective practice session for improving conceptual understanding, numerical problem-solving, accuracy, and time management.

The mock test covers key topics such as classification of solids, crystalline and amorphous solids, unit cells, crystal lattices, packing efficiency, coordination number, density of unit cells, voids, defects in solids, Schottky and Frenkel defects, electrical properties, magnetic properties, and related numerical problems.

This online Chemistry test is suitable for regular school and college examinations, NEET, JEE, PGT Chemistry examinations, entrance tests, competitive examinations, and general Chemistry practice. It is also useful for students from different educational backgrounds and countries, including learners following Singaporean, American, Chinese, and Russian education systems, wherever these Chemistry concepts are included in their syllabus.

Test Details:

Subject: Chemistry
Topic: Solid State
Questions: 20 MCQs
Time: 30 Minutes
Difficulty: Moderate to Advanced
Mode: Online Mock Test
Suitable for: Regular Exams, NEET, JEE, PGT & International Chemistry Practice

Take the test under timed conditions, check your understanding, identify weak areas, and improve your performance in Chemistry Solid State.

1 / 20

The colour exhibited by alkali-metal halide crystals due to anion vacancies occupied by electrons is associated with:

A. Schottky defects
B. Frenkel defects
C. F-centres
D. Interstitial defects

2 / 20

In a cubic unit cell, atoms of element X occupy all the corners, while atoms of element Y occupy all six face centres. What is the empirical formula of the compound?

A. XY
B. XY₂
C. XY₃
D. X₂Y₃

3 / 20

The percentage of empty space in a body-centred cubic crystal is approximately:

A. 26%
B. 32%
C. 47.6%
D. 68%

4 / 20

A small amount of SrCl₂ is added to NaCl crystal. Sr²⁺ ions replace some Na⁺ ions. The resulting crystal compensates for the charge difference by producing:

A. Anion vacancies
B. Cation vacancies
C. Interstitial Cl⁻ ions
D. Extra Na⁺ ions

5 / 20

For simple cubic, BCC and FCC structures respectively, the relationship between atomic radius $r$ and edge length $a$ is:

6 / 20

Which element is commonly used as a dopant to convert silicon into a p-type semiconductor?

A. Phosphorus
B. Arsenic
C. Boron
D. Antimony

7 / 20

Which statement regarding solid-state structures is incorrect?

A. A primitive cubic unit cell contains one effective atom.
B. An FCC unit cell contains four effective atoms.
C. A BCC unit cell contains two effective atoms.
D. The packing efficiency of simple cubic is approximately 68%.

8 / 20

The number of carbon atoms present in one conventional unit cell of diamond is:

A. 2
B. 4
C. 6
D. 8

9 / 20

What fraction of the volume of a simple cubic unit cell is occupied by the constituent atoms?

A. $π/4$
B. $π/6$
C. $π/3$
D. $2 π /6$

10 / 20

An ionic solid XY has the NaCl structure. If the radius of $X+X^+$ is 100 pm, the approximate radius of $Y-Y^-$ , using the limiting radius ratio for coordination number 6, is:

A. 100 pm
B. 125 pm
C. 165.7 pm
D. 200 pm

11 / 20

For a cubic unit cell of edge length $aa$ , the distance between a body-centred atom and a corner atom is:

12 / 20

Oxide ions form a cubic close-packed arrangement. If one-fourth of the tetrahedral voids are occupied by $A2+$ ions and all octahedral voids are occupied by $B+$ ions, the formula of the solid is:

A. AB₂O
B. AB₂O₂
C. A₂BO₃
D. AB₃O₂

13 / 20

CsBr crystallises in a body-centred cubic structure. If its edge length is 436.6 pm and molar mass is 213 g mol⁻¹, its density is approximately:

A. 2.13 g cm⁻³
B. 3.25 g cm⁻³
C. 4.25 g cm⁻³
D. 5.42 g cm⁻³

14 / 20

Lithium crystallises in a BCC structure. If the edge length of its unit cell is 351 pm, its atomic radius is approximately:

A. 101.5 pm
B. 124.0 pm
C. 151.8 pm
D. 175.5 pm

15 / 20

In a cubic close-packed structure, the number of octahedral voids associated with each constituent particle is:

A. 1/2
B. 1
C. 2
D. 4

16 / 20

Copper crystallises in an FCC structure. If its unit-cell edge length is 361 pm, the approximate atomic radius is:

A. 108 pm
B. 128 pm
C. 144 pm
D. 180 pm

17 / 20

A metal crystallises in an FCC structure. Its unit-cell edge is 404 pm and density is 2.72 g cm⁻³. The approximate molar mass of the metal is:

A. 18 g mol⁻¹
B. 27 g mol⁻¹
C. 40 g mol⁻¹
D. 54 g mol⁻¹

18 / 20

A metal has an FCC unit cell with edge length 408 pm. The approximate diameter of its atoms is:

A. 144 pm
B. 204 pm
C. 288 pm
D. 408 pm

19 / 20

The effective number of atoms present in one face-centred cubic (FCC) unit cell is:

A. 1
B. 2
C. 4
D. 6

20 / 20

An ionic solid AB has a BCC arrangement. If its unit-cell edge is 387 pm, the distance between the oppositely charged ions along the body diagonal is approximately:

A. 193.5 pm
B. 223.4 pm
C. 335 pm
D. 387 pm

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Exam Success

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