Which of the following statements is not true for both B and Al?

Question

Which of the following statements is not true for both B and Al? (A) They burn in oxygen to give oxides at high temperature (B) Their halides are Lewis acids (C) They combine with nitrogen to form nitrides (D) They react with HCl to form chlorides

Tardigrade Admin · Accepted Answer

Boron is not attacked by HCl; whilst Al reacts with HCl to from

A lC l_{3}

and

H_{2} (g)

.
A.

4 B + 3 O_{2} \to 2 B_{2} O_{3}

4 A l + 3 O_{2} \to 2 A l_{2} O_{3}

B. Halides of both are electron deficient, therefore, act as Lewis acids.
C.

2 B + N_{2} \to 2 BN

2 A l + N_{2} \to 2 A lN

Q. Which of the following statements is not true for both B and Al?

They burn in oxygen to give oxides at high temperature

Their halides are Lewis acids

They combine with nitrogen to form nitrides

They react with HCl to form chlorides

Boron is not attacked by HCl; whilst Al reacts with HCl to from AlCl3​ and H2​(g) . A. 4B+3O2​→2B2​O3​ 4Al+3O2​→2Al2​O3​ B. Halides of both are electron deficient, therefore, act as Lewis acids. C. 2B+N2​→2BN 2Al+N2​→2AlN

Boron is not attacked by HCl; whilst Al reacts with HCl to from $A lC l_{3}$ and $H_{2} (g)$ .
A. $4 B + 3 O_{2} \to 2 B_{2} O_{3}$
$4 A l + 3 O_{2} \to 2 A l_{2} O_{3}$
B. Halides of both are electron deficient, therefore, act as Lewis acids.
C. $2 B + N_{2} \to 2 BN$
$2 A l + N_{2} \to 2 A lN$