First slide

Anomalous properties of Boron

Question

$4 B (s) + 3 O_{2} (g) \overset{Δ}{⟶} I$
$2 Al (s) + N_{2} (g) \overset{Δ}{⟶} II$
Here, I and II are

Easy

A

$I \to B_{2} O_{3} (s), II \to AlN (g)$
B

$I \to B_{2} O_{3} (g), II \to AlN (s)$
C

$I \to B_{2} O_{3} (g), II \to AlN (g)$
D

$I \to B_{2} O_{3} (s), II \to AlN (s)$

Solution

$4 B (s) + 3 O_{2} (g) \overset{Δ}{⟶} 2 B_{2} O_{3} (s)$
$2 Al (s) + N_{2} (g) \overset{Δ}{⟶} 2 AlN (s)$

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