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Which of the following are not true abou...

Which of the following are not true about hexagonal close packing ?

A

It has 26% empty space

B

In this arrangment, third layer is identical to the first layer.

C

The coordination number in this arrangment is 6.

D

It is as closely packed as body centred cubic packing.

Text Solution

Verified by Experts

The correct Answer is:
C, D
A hexagonal close packing has coordination number 12 and is not as closely packed as bcc.
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Knowledge Check

  • Which of the following statement is not true about the hexagonal close packing ?

    A
    The coordination number is 12.
    B
    It has 74% packing efficiency .
    C
    Tetrahedral voids of the second layer are covered by the spheres of the third layer.
    D
    In this arrangement spheres of the fourth layer are exactly aligned with those of the first layer.

  • Which of the following statement is not true about the hexagonal close packing ?

    A
    The coordination number is 12
    B
    It has 74% packing efficiency
    C
    Tetrahedral voids of the second layer are covered by the spheres of the third layer
    D
    In this arrangement spheres of the fourth layer are exactly aligned with those of the first layer.

  • which of the following statemets is not true about the hexagonal close packing ?

    A
    the coordination number is 12
    B
    it has 74 % packing efficiency
    C
    Tetrahedral voids of the second layer are covered by the sphere of the third layer
    D
    in this arrangment spheres of the fouth layer are exactly alingened with those of the first layer