alleryStart learning →A **simple cubic** unit cell has effective number of particles:
- 1
- 2
- 4
- 8
Show answer and solution
Correct answer: A. 1
Each of 8 corner particles is shared by 8 cubes
⇒ contributes 1/8. Total: $8 \times 1/8 = 1$ particle per sc unit cell.
WBJEE Unit Cells — practice questions
Explore 6 free Unit Cells questions in WBJEE Chemistry. Open each question or exercise to read its content, reference answers and available explanation.
Practise Unit Cells with Quill →Unit Cells questions and exercises with answers
Showing questions 1–6 of 6.
A **simple cubic** unit cell has effective number of particles:Read the answer and worked solution →A **body-centred cubic (bcc)** unit cell has effective number of particles:Read the answer and worked solution →A **face-centred cubic (fcc)** unit cell has effective number of particles:Read the answer and worked solution →Each **corner** particle of a cubic unit cell is shared by how many neighbouring cubes?Read the answer and worked solution →Each **face-centre** particle of a cubic unit cell is shared by how many cubes?Read the answer and worked solution →Each **edge-centre** particle of a cubic unit cell is shared by how many cubes?Read the answer and worked solution →
Worked practice questions
A **body-centred cubic (bcc)** unit cell has effective number of particles:
- 1
- 2
- 4
- 8
Show answer and solution
Correct answer: B. 2
8 corners × 1/8 + 1 body centre × 1 = 1 + 1 = **2** particles per bcc unit cell.
**Examples:** Na, K, Cs, Cr, α-Fe.
A **face-centred cubic (fcc)** unit cell has effective number of particles:
- 1
- 2
- 4
- 6
Show answer and solution
Correct answer: C. 4
8 corners × 1/8 + 6 faces × 1/2 = 1 + 3 = **4** particles per fcc unit cell.
**Examples:** Cu, Au, Ag, Al, Ni.
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