Which among the following is (are) true for boron?

Action of air

: Amorphous boron on heating in air gives

B_{2} O_{3}

and

B N

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Action of water

: Boron in presence of vapour gives

H_{3} B O_{3}

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Action of acid

: Boron on reaction with

H_{2} S O_{4}

gives

H_{3} B O_{3}

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Action of alkali

: Boron on reaction with strong base release

H_{2}

gas

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Solution

The correct options are
A $Action of air$ : Amorphous boron on heating in air gives $B_{2} O_{3}$ and $B N$
C $Action of acid$ : Boron on reaction with $H_{2} S O_{4}$ gives $H_{3} B O_{3}$
D $Action of alkali$ : Boron on reaction with strong base release $H_{2}$ gas
$Action of air$ : Amorphous boron on heating in air gives $B_{2} O_{3}$ and $B N$ .
$4 B + 3 O_{2} \to 2 B_{2} O_{3}$
$2 B + N_{2} \to 2 B N$

$Action of water$ : Boron in presence of vapour gives $B_{2} O_{3}$ .
$2 B + 3 H_{2} O (v) \to B_{2} O_{3} + 3 H_{2}$

$Action of acid$ : Boron on reaction with $H_{2} S O_{4}$ gives $H_{3} B O_{3}$ .
$2 B + 3 H_{2} S O_{4} \to 2 H_{3} B O_{3} + 3 S O_{2}$

$Action of alkali$ : Boron on reaction with strong base release $H_{2}$ gas.
$2 B + 6 K O H \to 2 K_{3} B O_{3} + 3 H_{2}$

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