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Physical and Chemical Changes — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes1 Mark
MCQ
Which of the following changes is accompanied by sound?
  • A
    Photosynthesis
  • B
    Spoilage of food
  • ✓
    Explosion of fireworks
  • D
    None of these
✓

Answer

Correct option: C.
Explosion of fireworks
Burning of any substance is always accompanied by the production of heat, gas and light. Explosion of fireworks produce heat, light and sound, gas and smoke formed. The cut fruits and vegetables change its colour after some time.

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