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NH_4^+ and Br^- ions have ionic radii of 143 pm and 196 pm respectively. The coordination number of NH_4^+ ion in NH_4Br is |
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Answer» <BR> Solution :`r_(NH_4^+)//r_(Br^-)`=143/196=0.730 which lies in the range 0.414-0.732 . HENCE, coordination NUMBER =6. |
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