B₂O₃ + Mg(excess) → (A) ; (A) + N₂ (white heat) → (C)
(A) is an element whose oxide is acidic. Select the correct statement(s) about (C) :

Question

B₂O₃ + Mg(excess) → (A) ; (A) + N₂ (white heat) → (C) (A) is an element whose oxide is acidic. Select the correct statement(s) about (C) :

TestHub · Accepted Answer

B₂O₃ + 3Mg → 2B + 3MgO, so (A) = B and 2B + N₂ → 2BN, (C) = BN. Each BN unit has 12 electrons (5 + 7), isoelectronic with a C-C unit; hexagonal BN is graphite-like, cubic BN is diamond-like and extremely hard; BN + 3H₂O → NH₃ + H₃BO₃. All four statements are correct.

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