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Summary: effects of burning non-metals in air.

Answer Text:
Summary: effects of burning non-metals in air.

Precautions:
The experiment should be done in a fume cupboard.
Reason:
Products of burning sulphur and phosphorus in air are poisonous.
Note:
- Most non-metallic oxides are acidic in nature and therefore turn litmus red and are thus referred to as acidic oxides;
- Some non-metallic oxides form oxides which are neither acidic nor basic and are thus termed neutral oxides; e.g. carbon (II) oxide and water (hydrogen oxide);