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Changes Around Us. — Science STD 8 — Question

Tamilnadu BoardEnglish MediumSTD 8ScienceChanges Around Us.2 Marks
Question
Write the effects of chemical reactions.
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Answer

Chemical reaction requires a specific condition to occur. When chemical reactions take place there will be production of heat, light, sound, pressure etc.

Effects of chemical reactions are:

  1. Biological effects
  2. Environmental effects
  3. Production of heat, light, sound and pressure
  4. Evolution of gas, changes in colour and change in state.

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