Question

Classify the following changes as either aphysical ora chemical change.

a) Burning of Magnesium

b) Chopping of wood

c) Melting of wax

d) Digestion of food

Answer 1

a) a chemical change as burning leads to the formation of new substance with totally different properties
b) a physical change as chopping wood will not change the chemical properties of the wood.
c) it's a physical change since the wax melts that is it's physical state changes from solid to liquid no chemical change occurs in this case.
d) it is a chemical change as the digestion of food converts complex substances into simpler ones so there chemical properties are changed.
hope it helps

Answer 2

chemical change :- 1) burning of magnesium
                               2) digestion of food

physical change :- 1) chopping of wood
                              2) melting of wax

hope it helps

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