\( \mathrm{Be} \) and \( \mathrm{Al} \) show diagonal relationship hence both have (a) Same degr...

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\( \mathrm{Be} \) and \( \mathrm{Al} \) show diagonal relationship hence both have
(a) Same degree of electronegativity.
(b) Basic nature of oxides.
(c) Approximately same charge radius ratio.
(d) \( \mathrm{BeCl}_{2} \) and \( \mathrm{AlCl}_{3} \) are volatile and fume in moist air.
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