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Solid State WBJEE MCQ & Practice Questions

Practice Solid State MCQs for WBJEE Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.

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Solid State Revision Guide for WBJEE Chemistry

Solid State is part of WBJEE Chemistry preparation. A strong revision plan should combine concept review with exam-style questions so that definitions, relationships, calculations and exceptions are recalled accurately.

Use the sample MCQs on this page to check understanding, then attempt the related ChemNexa tests for broader practice. When an answer is wrong, review the explanation and return to the underlying concept before attempting another set.

Important Topics

  • Core definitions and principles
  • Important equations or relationships
  • Common applications and examples
  • Frequently confused concepts
  • Exam-style multiple-choice questions
  • Error review and targeted revision

Revision Tip

Create a one-page summary of trends, structures, reactions, exceptions and key terminology for Solid State, then test recall with mixed MCQs.

What to practise in Solid State

Concept Revision

Revise definitions, principles, equations, trends and core ideas from Solid State before attempting MCQs.

Exam-style MCQs

Use chapter-focused multiple-choice practice to improve accuracy, recall and application for WBJEE Chemistry.

Performance Practice

Attempt ChemNexa tests, review results and return to weak areas for another round of targeted revision.

Top 20 Solid State MCQs with Answers

These public questions are selected from the exact Solid State chapter, screened for topic relevance and deduplicated so repeated versions of the same MCQ are not shown publicly. Use them for quick revision, then sign in to attempt the complete test experience with more questions, results and performance review.

WBJEE Chemistry · Solid State · Very Very Hard

1. A crystalline solid is characterized by:

  • A. No definite melting point
  • B. Complete randomness
  • C. Long-range periodic order
  • D. Only short-range order
Answer: C
Explanation: Crystalline solids possess long-range periodic arrangement.

WBJEE Chemistry · Solid State · Very Very Hard

2. An amorphous solid generally possesses:

  • A. A sharp cleavage plane always
  • B. Short-range order
  • C. Perfect long-range order
  • D. A unique crystal lattice
Answer: B
Explanation: Amorphous solids lack long-range periodicity.

WBJEE Chemistry · Solid State · Very Very Hard

3. A crystalline solid generally has:

  • A. A sharp melting point
  • B. No definite melting range
  • C. Isotropic properties in every direction
  • D. No unit cell
Answer: A
Explanation: Crystalline solids commonly melt sharply.

WBJEE Chemistry · Solid State · Very Very Hard

4. Anisotropy is commonly associated with:

  • A. Ideal gases
  • B. Liquids only
  • C. All amorphous solids
  • D. Crystalline solids
Answer: D
Explanation: Directional dependence arises from ordered crystal structure.

WBJEE Chemistry · Solid State · Very Very Hard

5. The smallest repeating structural portion of a crystal lattice is the:

  • A. Void
  • B. Grain boundary
  • C. Unit cell
  • D. Molecule only
Answer: C
Explanation: Repeating unit cells generate the crystal lattice.

WBJEE Chemistry · Solid State · Very Very Hard

6. The number of atoms effectively present in a simple cubic unit cell is:

  • A. 8
  • B. 1
  • C. 2
  • D. 4
Answer: B
Explanation: Eight corner atoms each contribute 1/8, giving one atom.

WBJEE Chemistry · Solid State · Very Very Hard

7. The number of atoms effectively present in a body-centred cubic unit cell is:

  • A. 2
  • B. 1
  • C. 4
  • D. 6
Answer: A
Explanation: Corners contribute one atom and the body-centre contributes one.

WBJEE Chemistry · Solid State · Very Very Hard

8. The number of atoms effectively present in a face-centred cubic unit cell is:

  • A. 2
  • B. 1
  • C. 6
  • D. 4
Answer: D
Explanation: Corners contribute one and six face atoms contribute three, total four.

WBJEE Chemistry · Solid State · Very Very Hard

9. Coordination number of a simple cubic lattice is:

  • A. 12
  • B. 4
  • C. 6
  • D. 8
Answer: C
Explanation: Each lattice point has six nearest neighbours.

WBJEE Chemistry · Solid State · Very Very Hard

10. Coordination number of a body-centred cubic lattice is:

  • A. 4
  • B. 8
  • C. 6
  • D. 12
Answer: B
Explanation: The body-centred atom has eight corner nearest neighbours.

WBJEE Chemistry · Solid State · Very Very Hard

11. Coordination number of a close-packed/fcc lattice is:

  • A. 12
  • B. 8
  • C. 6
  • D. 4
Answer: A
Explanation: Close-packed structures have coordination number 12.

WBJEE Chemistry · Solid State · Very Very Hard

12. Packing efficiency of simple cubic is approximately:

  • A. 68%
  • B. 74%
  • C. 100%
  • D. 52.4%
Answer: D
Explanation: Simple cubic packing occupies about 52.4% of the cell volume.

WBJEE Chemistry · Solid State · Very Very Hard

13. Packing efficiency of bcc is approximately:

  • A. 74%
  • B. 60%
  • C. 68%
  • D. 52.4%
Answer: C
Explanation: BCC packing efficiency is about 68%.

WBJEE Chemistry · Solid State · Very Very Hard

14. Packing efficiency of fcc/ccp is approximately:

  • A. 50%
  • B. 74%
  • C. 68%
  • D. 52.4%
Answer: B
Explanation: Close packing occupies about 74% of space.

WBJEE Chemistry · Solid State · Very Very Hard

15. In a simple cubic lattice, edge length a and atomic radius r satisfy:

  • A. a=2r
  • B. a=4r/sqrt(3)
  • C. a=2sqrt(2)r
  • D. a=sqrt(2)r
Answer: A
Explanation: Atoms touch along the cube edge in simple cubic.

WBJEE Chemistry · Solid State · Very Very Hard

16. In bcc, edge length and radius satisfy:

  • A. a=2r
  • B. sqrt(2)a=4r
  • C. a=4r
  • D. sqrt(3)a=4r
Answer: D
Explanation: Atoms touch along the body diagonal.

WBJEE Chemistry · Solid State · Very Very Hard

17. In fcc, edge length and radius satisfy:

  • A. a=2r
  • B. a=4r
  • C. sqrt(2)a=4r
  • D. sqrt(3)a=4r
Answer: C
Explanation: Atoms touch along the face diagonal.

WBJEE Chemistry · Solid State · Very Very Hard

18. The density of a cubic unit cell is given by:

  • A. rho=Z/(Ma^3N_A)
  • B. rho=ZM/(a^3 N_A)
  • C. rho=a^3 N_A/(ZM)
  • D. rho=ZM a^3/N_A
Answer: B
Explanation: Mass per cell is ZM/N_A and cell volume is a^3.

WBJEE Chemistry · Solid State · Very Very Hard

19. In a close-packed structure containing N particles, the number of octahedral voids is:

  • A. N
  • B. 2N
  • C. N/2
  • D. 3N
Answer: A
Explanation: Number of octahedral voids equals the number of packed particles.

WBJEE Chemistry · Solid State · Very Very Hard

20. In a close-packed structure containing N particles, the number of tetrahedral voids is:

  • A. N
  • B. N/2
  • C. 4N
  • D. 2N
Answer: D
Explanation: There are two tetrahedral voids per packed particle.

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Solid State Practice Tests

Solid State Frequently Asked Questions

How should I prepare Solid State for WBJEE Chemistry?

Revise the core concepts first, make a short list of important relationships or exceptions, and then solve chapter-focused MCQs while reviewing every error.

How can ChemNexa help with Solid State practice?

This page provides public sample questions and links to published ChemNexa tests so you can combine quick revision with structured practice.

What should I do after getting an MCQ wrong?

Identify whether the mistake came from a concept gap, calculation, unit, sign, wording or memory error, review that point, and then attempt a similar question again.

Continue with another chapter to build connected concepts and strengthen your overall Chemistry preparation.

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