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  • Give answer! Percentages of free space in cubic close packed structure and in body centred packed structure are respectively

Percentages of free space in cubic close packed structure and in body centred packed structure are respectively

  • Option 1)

    48% and 26%

  • Option 2)

    30% and 26%

  • Option 3)

    26% and 32%

  • Option 4)

    32% and 48%

 

Answers (1)

best_answer

As we learnt in

Packing fraction for face centered cubic unit cell -

Pf = 0.74

-

 

 

Packing fraction for body centered cubic unit cell -

Pf = 0.68

-

 

(1)    Packing efficiency in CCP is 74% and empty space is 26%.

(2)    Packing efficiency in BCC is 68% and empty space is 32%.

Correct option is 3.

 

 


Option 1)

48% and 26%

This is an incorrect option.

Option 2)

30% and 26%

This is an incorrect option.

Option 3)

26% and 32%

This is the correct option.

Option 4)

32% and 48%

This is an incorrect option.

Posted by

divya.saini

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