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The Solid State

    • Question 201
    CBSEENCH12005549
    Wired Faculty App

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

    Solution

    C.

    coloured 
    Question 202
    CBSEENCH12005550
    Wired Faculty App

    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
    Wired Faculty App

    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
    Wired Faculty App

    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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