CAIE IGCSE Chemistry 7.2.1 Classify Oxides As Acidic Questions

Classify oxides using their reactions with water, pH and indicators, distinguishing non-metal acidic oxides from metal basic oxides.

Exam points

classify SO2 or CO2 as acidic oxides and CuO or CaO as basic oxides
interpret pH or indicator results after oxides dissolve in water
link non-metal oxides with acidic behaviour and metal oxides with basic behaviour
distinguish neutral oxides such as carbon monoxide from acidic and basic examples

[Maximum number: 1]

Which oxides are basic?
1 calcium oxide
2 sodium oxide
3 iron(II) oxide

A

1, 2 and 3

B

1 and 2 only

C

2 and 3 only

D

3 only

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