Question

Assertion : Packing efficiency of body centred cubic structure is $68\%$.
Reason : $68\%$ is the maximum packing efficiency any crystal can have.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (C)

$fcc$ has $74\%$ packing efficiency.