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The Solid State Practice Questions

Class 12 · Chemistry · 2219 free MCQs with instant results and detailed explanations.

2219
Total
702
Easy
1099
Medium
418
Hard

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Topics in The Solid State

Defects 587
Packing Efficiency 507
Unit Cell 521
Crystal Lattice 604

Sample Questions from The Solid State

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Q1
Easy
Which of the following describes a crystal lattice?
A. A three-dimensional arrangement of atoms in a solid
B. A two-dimensional arrangement of molecules in a liquid
C. A one-dimensional arrangement of ions in a gas
D. An amorphous arrangement of particles
Show Answer & Explanation
Correct Answer: A
A crystal lattice is specifically defined as a three-dimensional structure where atoms, ions, or molecules are arranged in a repeating pattern, characteristic of solid-state materials.
Q2
Easy
In a face-centered cubic (FCC) unit cell, how many atoms are effectively present?
A. 4
B. 2
C. 1
D. 6
Show Answer & Explanation
Correct Answer: A
In an FCC unit cell, there are 8 corner atoms (1/8 each) and 6 face-centered atoms (1/2 each), totaling 4 atoms when calculated.
Q3
Easy
What is the coordination number of sodium ions (Na+) in sodium chloride (NaCl)?
A. 6
B. 4
C. 8
D. 2
Show Answer & Explanation
Correct Answer: A
In sodium chloride, each sodium ion is surrounded by six chloride ions, resulting in a coordination number of 6, typical of the cubic arrangement.
Q4
Medium
What type of crystal system has all sides equal and all angles equal to 90 degrees?
A. Cubic
B. Tetragonal
C. Orthorhombic
D. Rhombohedral
Show Answer & Explanation
Correct Answer: A
The cubic crystal system is characterized by equal lengths and 90 degree angles between the axes.
Q5
Medium
In a face-centered cubic (FCC) structure, how many atoms are present in one unit cell?
A. 1
B. 2
C. 4
D. 8
Show Answer & Explanation
Correct Answer: C
In an FCC unit cell, there are 4 atoms per unit cell (1/8 atom at each corner × 8 + 1/2 atom at each face × 6 = 4).
Q6
Medium
Which type of solid does not conduct electricity in any state?
A. Metallic solid
B. Ionic solid
C. Molecular solid
D. Covalent network solid
Show Answer & Explanation
Correct Answer: C
Molecular solids consist of neutral molecules and do not have free electrons or ions to conduct electricity.
Q7
Medium
What is the coordination number of a body-centered cubic (BCC) structure?
A. 4
B. 6
C. 8
D. 12
Show Answer & Explanation
Correct Answer: B
In a BCC structure, each atom is surrounded by 6 atoms, hence the coordination number is 6.
Q8
Hard
Which of the following types of defects is characterized by the absence of an atom from its lattice point?
A. Schottky defect
B. Frenkel defect
C. Interstitial defect
D. Edge dislocation
Show Answer & Explanation
Correct Answer: A
A Schottky defect involves the absence of ions (cation or anion) from their lattice points, maintaining charge neutrality.
Q9
Hard
In a face-centered cubic lattice, what is the coordination number of the atoms?
A. 4
B. 6
C. 8
D. 12
Show Answer & Explanation
Correct Answer: B
In a face-centered cubic lattice, each atom is surrounded by 6 other atoms, giving a coordination number of 6.
Q10
Hard
What is the packing efficiency of a body-centered cubic (BCC) structure?
A. 68%
B. 74%
C. 52%
D. 32%
Show Answer & Explanation
Correct Answer: A
The packing efficiency of a BCC structure is approximately 68%, which is calculated based on the volume of atoms in the unit cell compared to the total volume.

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The Solid State — Class 12 Chemistry Practice Questions Online

This page contains 2219 practice MCQs for the chapter The Solid State in Class 12 Chemistry. The questions are organized by difficulty — 702 easy, 1099 medium, 418 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.