3) Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
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Step-by-step explanation:
Physical changes only lead to changes in physical properties of the substance and are reversible chemical changes lead to change in composition or the structure and are irreversible in nature.
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Answer:
a) photosynthesis - chemical change
b) dissolving sugar in water - physical change
c) burning of coal - chemical change
d) melting of wax - physical change
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