The r+/r- ratio of ZnS is 0.402. Pick out the false statements of the following 

  1. A

    ZnS is 4: 4 coordination compound. 

  2. B

    ZnS does not crystallize in rock salt type lattice because r+/rs too small to avoid overlapping of S2 ions

  3. C

    Zn2+ ion is too small to fit precisely into the octahedral voids of S2- ions

  4. D

    Zn2+ion is too large to fit into the octahedral voids of S2- ions.

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    Solution:

    Zn2+ ion is too small to fit into the octahedral voids of S2− ions.

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