Question

is a chemical change.

a) Evaporation

b) Heating of copper and sulphur

c) Freezing of water

d) Mixing of H2 and O2​

Answer 1

Answer:

answer is option b - heating of copper and sulphur.

hope it's helpful

Answer 2

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.is a chemical change

a) Evaporation

b) Heating of copper and sulphur

c) Freezing of water

d) Mixing of H2 and O2

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is a chemical change - option B - heat of copper and sulphur .