\( \mathrm{pH} \) of an aqueous \( \mathrm{NaCl} \) solution at \( 50^{\circ} \mathrm{C} \) shou...

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\( \mathrm{pH} \) of an aqueous \( \mathrm{NaCl} \) solution at \( 50^{\circ} \mathrm{C} \) should be :
(a) 7
(b) \( 7 \)
(c) \( 7 \)
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