Home
Class 12
CHEMISTRY
Assertion: bcc and hcp have same packing...

Assertion: bcc and hcp have same packing efficiency
Reason: Both have same number of atoms per unit cell and same arrangement

A

If both assertion and reason are correct and reason is correct explanation for assertion

B

If both assertion and reason are correct but reason is not correct explanation for assertion

C

If assertion is correct but reason is incorrect

D

If both assertion and reason are incorrect

Text Solution

Verified by Experts

The correct Answer is:
D
Correct Assertion bcc has `68%` and hcp has `74%` packing efficiency
Correct Reason in bcc 2-atoms are present per unit cell while in hcp 4-atoms are present per unit cell and also have different arrangments
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    DINESH PUBLICATION|Exercise Integer|13 Videos

  • SOLID STATE

    DINESH PUBLICATION|Exercise Matrix|4 Videos

  • SOLID STATE

    DINESH PUBLICATION|Exercise Straight objective|26 Videos

  • REDOX REACTIONS

    DINESH PUBLICATION|Exercise Ultimate Preparation|9 Videos

  • SOLUTIONS

    DINESH PUBLICATION|Exercise ULTIMATE PREPARATORY PACKAGE|10 Videos

Similar Questions

Explore conceptually related problems

The number of atoms per unit cell in bcc lattice is

Isotopes have same number of atomic mass

HCP unit cell number of atoms

In sc, bcc and fcc the ratio of number of atoms per unit cell is given by

Assertion : L//R and CR both have same dimensions Reason L//R and CR both have dimensions of time

Acids and ester having the same number of carbon atoms are:

Which of the following pairs have the same number of atoms ?

DINESH PUBLICATION-SOLID STATE-A.R
  1. Assertion: Crystalline solids are anisotropic. Reason: Cystalline so...

    Text Solution

    |

  2. Assertion: In a crystal, the size of the cation is larger in a tetrahe...

    Text Solution

    |

  3. Assertion: In a close packing of spheres, a tetrahedral void is surrou...

    Text Solution

    |

  4. Assertion :In NaCIcrystal each Na^(+) ion is tourching 6 CI^(-) ion bu...

    Text Solution

    |

  5. Statement : Due to Frenkel defect the density of the crystalline solid...

    Text Solution

    |

  6. Assertion : On heating ferromagnetic or ferromagnetic substance , the...

    Text Solution

    |

  7. Assertion (A) : The electrical conductivity of a semiconductor increas...

    Text Solution

    |

  8. Assertion (A) : Group-13-doped crystals of Si are called p-type semico...

    Text Solution

    |

  9. Assertion (A) : Graphite is an example of tetragonal crystal system. ...

    Text Solution

    |

  10. Band gap in germanium is small. The energy spread of each germanium ...

    Text Solution

    |

  11. STATEMENT -1 : In NaCl structure , Na^(+) ion occupy octahedral hole...

    Text Solution

    |

  12. Assertion: In the body centred cubic structure of CsCl the arrangement...

    Text Solution

    |

  13. Assertion: Diamond has a ccp arrangement in which corners, face centre...

    Text Solution

    |

  14. Assertion: Metals are generally good conductors of electricity Reas...

    Text Solution

    |

  15. Assertion: p-type semiconductors are good conductors of electricity du...

    Text Solution

    |

  16. Assertion: Increase in dielectric constant is observed for crystals ha...

    Text Solution

    |

  17. Assertion: Every 4th layer is identical to first layer in ccp pattern ...

    Text Solution

    |

  18. Assertion: bcc and hcp have same packing efficiency Reason: Both hav...

    Text Solution

    |

  19. Assertion : The number of tetrahedral voids is double the number of oc...

    Text Solution

    |

  20. Assertion: Metal dificiency defect can be seen in FeO. Reason: Li co...

    Text Solution

    |