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Reactivity with Air and Water (Group 2)

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Question

(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.

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Solution

The neutral oxide is CO.
The acidic oxides are $B_{2} O_{3}, S i O_{2}$ and $C O_{2}$ .
The basic oxide is $T l_{2} O_{3}$ .
The amphoteric oxides are $A l_{2} O_{3}$ and $P b O_{2}$ .

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Classify ${Na}_{2} O$ , ${Al}_{2} O_{3}$ and ${SO}_{3}$ as acidic, basic or amphoteric oxide. [3 MARKS]

N i O, A l_{2} O_{3}, B_{2} O_{3}, P b O_{2}, Z n O, M g O

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