Which of the following is a covalent compound? P (a) \( \mathrm{Al}_{2} \mathrm{O}_{3} \) (b) \(...

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Which of the following is a covalent compound?
P
(a) \( \mathrm{Al}_{2} \mathrm{O}_{3} \)
(b) \( \mathrm{AlF}_{3} \)
W)
(c) \( \mathrm{AlCl}_{3} \)
(d) \( \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3} \)
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