Chemistry·MCQ Practice

Packing Efficiency — MCQ Practice

NEET UG
Version 1Updated 22 Mar 2026

Interactive MCQ Practice

Test your knowledge. Click “Solve” to reveal options, select your answer, then check the result. 6 questions available.

Q1medium

An element crystallizes in a body-centered cubic (BCC) structure. If the atomic radius of the element is 173.2,pm173.2,\text{pm}, what is the edge length of the unit cell?

Q2easy

What is the percentage of void space in a face-centered cubic (FCC) unit cell?

Q3easy

Which of the following cubic unit cells has the lowest packing efficiency?

Q4medium

An element with atomic mass MM crystallizes in an FCC lattice with unit cell edge length 'a'. What is the expression for its density?

Q5easy

If the packing efficiency of a crystal structure is 68%68\%, what type of cubic unit cell does it most likely represent?

Q6medium

In a face-centered cubic (FCC) unit cell, what is the relationship between the edge length 'a' and the atomic radius 'r'?

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