Concept explainers
(a)
Interpretation:
Alcohol burns has to be defined as a chemical change or a physical change.
Concept Introduction:
Chemical change:
When a substance gets converted to different kinds of matter, it is said to be chemical change.
Physical change:
When a substance undergoes change, without change in its composition, it is said to be physical change.
(b)
Interpretation:
Sugar crystallizes has to be defined as a chemical change or a physical change.
Concept Introduction:
Refer to part-a.
(c)
Interpretation:
Gas bubbles rise out of a glass of soda has to be defined as a chemical change or a physical change.
Concept Introduction:
Refer to part-a.
(d)
Interpretation:
A tomato ripens has to be defined as a chemical change or a physical change.
Concept Introduction:
Refer to part-a.
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Chemistry: Principles and Practice
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