The Solid State

  • Question 201
    CBSEENCH12005549

    The presence of F-centres in a solid makes it
    • conducting
    • colourless
    • coloured 
    • non-conducting

    Solution

    C.

    coloured 
    Question 202
    CBSEENCH12005550

    Most crystals show good cleavage because their atoms, ions and molecules are
    • Weakly bonded together
    • strongly bonded together
    • spherically symmetrical
    • arranged in planes.

    Solution

    D.

    arranged in planes.
    Question 203
    CBSEENCH12005551

    The available space occupied by spheres of equal size in three dimensions in both hcp and ccp arrangements is:
    • 74%
    • 70%

    • 60.4%

    • 52.4%

    Solution

    A.

    74%
    Question 204
    CBSEENCH12005552

    The tetrahedral voids formed by ccp arrangement of CI ions in rock salt structure are:
    • Occupied by Na+ ions
    • Occupied by CI ions
    • Occupied by either Na+ or CI ions
    • Vacant

    Solution

    D.

    Vacant

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