Which of the following set of solids contains only ionic solids ? (...
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Which of the following set of solids contains only ionic solids ?
(1) \( \mathrm{NaCl}, \mathrm{MgO} \& \mathrm{ZnS} \)
(2) \( \mathrm{CaF}_{2}, \mathrm{ZnS}, \mathrm{SiO}_{2} \)
\( \mathrm{P} \)
(3) \( \mathrm{MgO}, \mathrm{SiO}_{2}, \mathrm{KCl} \)
(4) \( \mathrm{SiO}_{2}, \mathrm{SiC}, \mathrm{AIN} \)
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