Physical and Chemical Changes — Science STD 7 — Question
Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes1 Mark
MCQ
Adding sodium chloride to water is a:
✓
Physical change
B
Chemical change
C
Irreversible change
D
None of these
✓
Answer
Correct option: A.
Physical change
Physical changes are changes in the physical properties of substances. No new substances are formed in these changes.
The addition of sodium chloride to water does not result in the formation of any new substance, hence it is a physical change.
Also, sodium chloride can be reversed back to its original state by simple evaporation of water.
Therefore, it is a reversible change.
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