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Physical and Chemical Changes — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes1 Mark
MCQ
Brown colour formation in an exposed apple after it's cut is:
  • A
    Physical change
  • ✓
    Chemical change
  • C
    Reversible change
  • D
    No change
✓

Answer

Correct option: B.
Chemical change
The brown colour of the apple after cutting is due to the chemical change of the enzymes. When an apple is cut, oxygen is introduced into the exposed part and so, it changes colour. This is not a reversible change.

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