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Asked by tirumalasandeep 6th April 2017, 5:11 PM
Answered by Expert
Correct option is (a) the r+/r- ratio is 0.402 , too low to avoid anion-anion contact in the NaCl structure.

The radius ratio 0.4 of Zn+2 to S-2 in zinc blende suggest a tetrahedral arrangement for ZnS.

The ionic solids having NaCl type crystal structure are HgO, CaO, SrO, NaBr, KCl.

Answered by Expert 7th April 2017, 6:01 PM
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