Sodium chloride has a crystalline structure made P up of \( \mathrm...

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Sodium chloride has a crystalline structure made
P up of \( \mathrm{Na}^{+} \)and \( \mathrm{Cl}^{-} \)ions. Why does \( \mathrm{NaCl} \) not

W conduct electricity in solid state?
(1) Solids do not conduct electricity.
(2) The ions of \( \mathrm{NaCl} \) become mobile only in molten state and are not free to move in solid state.
(3) The crystalline structure does not have ions.
(4) When a bond is formed between ions they lose their charges.
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