- 1(current)
Q. No.The most efficient packing is present in -
1. HCP and BCC
2. HCP and CCP
3. BCC and CCP
4. BCC and Simple cubic cell
Subtopic: Â Density & Packing Fraction |
 82%
From NCERT
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The percentage of empty space in a body centred cubic arrangement is ......... .
1. 74
2. 68
3. 32
4. 26
Subtopic: Â Density & Packing Fraction |
 83%
From NCERT
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The incorrect statement among the following regarding hexagonal close packing is:
| 1. | The coordination number is 12. |
| 2. | It has 74% packing efficiency. |
| 3. | Tetrahedral voids of the second layer are covered by the spheres of the third layer. |
| 4. | In this arrangement, spheres of the fourth layer are exactly aligned with those of the first layer. |
Subtopic: Â Density & Packing Fraction |
 61%
From NCERT
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The correct order of the packing efficiency in different types of unit cells is-
1. Fcc < Bcc < Simple cubic
2. Fcc > Bcc > Simple cubic
3. Fcc < Bcc > Simple cubic
4. Bcc < Fcc > Simple cubic
Subtopic: Â Density & Packing Fraction |
 86%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | The packing efficiency is maximum for the fcc structure. |
| Reason (R): | The coordination number is 12 in fcc structure. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Â Density & Packing Fraction |
 52%
From NCERT
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Hints
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- 1(current)
Q. No.
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