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Determine whether each change is physical or chemical. What kind of property (chemical or physical) is demonstrated in each case?a) the evaporation of rubbing alcohol b) the burning of lamp oil c) the bleaching of hair with hydrogen peroxided) the formation of frost on a cold night

Question

Determine whether each change is physical or chemical. What kind of
property (chemical or physical) is demonstrated in each case?
a) the evaporation of rubbing alcohol
b) the burning of lamp oil
c) the bleaching of hair with hydrogen peroxide
d) the formation of frost on a cold night

check_circleAnswer
Step 1

(a)

The evaporation of rubbing alcohol indicates that it changes from liquid to gas. But, it still remains as alcohol. Hence, the change is a physical one and the physical property demonstrated is volatility.

Step 2

(b)

The burning of lamp oil indicates that it reacts with oxygen to form carbon dioxide and water. Hence, the change is a chemical one and the chemical property demonstrated is flammability.

Step 3

(c)

The bleaching of hair with hydrogen peroxide indicates that there will be change in pigment molecules in hair that g...

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