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Characteristics of p- Block Elements

If B2O3 is ...

Question

If $B_{2} O_{3}$ is acidic in nature, the nature of $A l_{2} O_{3}$ could be:

acidic

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basic

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amphoteric

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neutral

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Solution

The correct option is C amphoteric
$A l_{2} O_{3}$ is amphoteric, as it can acts as acid as well as base.
with alkali:
$2 N a O H + A l_{2} O_{3} \to 2 N a A l O_{2} + H_{2} O$
with acid:
$6 H C l + A l_{2} O_{3} \to 2 A l C l_{3} + 3 H_{2} O$

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Similar questions

(a) Classify following oxides as neutral, acidic, basic or amphoteric:

$C O, B_{2} O_{3}, S i O_{2}, C O_{2}, A l_{2} O_{3}, P b O_{2}, T l_{2} O_{3}$

(b)Write suitable chemical equations to show their nature.

B_{2} O_{3}

S i O_{2}

L i_{2} O, B e O, B_{2} O_{3}

S_{1}

(B_{2} O_{3})

(S i O_{2})

S_{2}

(A l_{2} O_{3})

(G a_{2} O_{3})

S_{3}

(l n_{2} O_{3})

(T l_{2} O_{3})

S_{4}

(G e O_{2})

(S n O_{2})

B_{2} O_{3}, A l_{2} O_{3}

A l_{2} O_{3}

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