Which of the following set is having correct statements here regarding both B and Al?
$1 .$ They combine with nitrogen to form nitrides
$2 .$ They react with HCl to form chlorides
$3 .$ They burn in oxygen to give oxides at high temperature
$4 .$ Their halides are Lewis acids

Question

TestHub · Accepted Answer

Both B and Al can react with nitrogen to form nitride as follows
$2 B + N_{2} \to 2 B N$
$2 A l + N_{2} \to 2 A l N$
Boron is not attacked by HCl; while Al reacts with HCl to from $A l C l_{3}$ and $H_{2} (g)$ .
Both B and Al can react with oxygen to form their oxides.
$4 B + 3 O_{2} \to 2 B_{2} O_{3}$
$4 A l + 3 O_{2} \to 2 A l_{2} O_{3}$
Halides of both $(B X_{3}, A l X_{3})$ are electron deficient molecule, so they act as Lewis acids.

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