Question

classify as physical or chemical change
1. photosynthesis
2. melting of wax
3.burning of coal
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Answer 1

Answer:

The following are :-

1. Chemical Change
2. Physical Change
3. Chemical Change

Explanation:

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Answer 2

Answer:

Photosynthesis:  CHEMICAL change  (change of CO2 and H2O)

Melting of wax:   PHYSICAL change (Can be reused to a certain limit)

burning of coal:   CHEMICAL change (Coal is completely burnt)

Hope it helps :D