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chemical reactions and equations — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencechemical reactions and equations3 Marks
Question
What is meant by decomposition reaction? Give examples.
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Answer

  • A chemical reaction in which a single compound on heating or in presence of sunlight forms more than one products is called decomposition reaction.
  • Examples:
  • $(1)$ $CaCO _3(s) \frac{\text { Heat }}{\rightarrow} CaO ( s )+ CO _2(g)$
  • Calcium Calcium carbonate Oxide
  • $(2)$ $2 FeSO _4(s) \xrightarrow{ Heat } Fe _2 O _3(s)+ SO _2(g)+ SO _3(g)$
  • Ferrous Ferric Sulphate Oxide
  • $(3)$ $2 Pb\left( NO _3\right) \xrightarrow{\text { Heat }} 2 PbO ( s )+4 NO _2(g)+ SO _3(g)$
  • Lead nitrate Lead Oxide

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