Question

In addition to the formation of new products, what changes do the chemical changes accompany? [5 marks]

Answer 1

In addition to new products, the following changes may chemical change accompany:

• Heat, light or any other radiation (e.g. ultraviolet) may be given off or absorbed. [1 mark]
• Sound may be produced. [1 mark]
• A change in smell may take place or a new smell may be given off. [1 mark]
• A colour change may take place. [1 mark]
• A gas may be formed. [1 mark]