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Mnemonics: Chemical Reactions & Equations | Science Class 10 PDF Download

1. Types of Decomposition Reaction

Mnemonic: "PET"

  • PPhotolytic Reaction – Decomposition caused by light, where substances break down when exposed to light.
  • EElectrolytic Reaction – Decomposition caused by electric current, where substances break down in an electrolyte solution.
  • TThermal Reaction – Decomposition caused by heat, where substances break down when heated.

2. Oxidation and Reduction Reactions

Mnemonic: "OIL RIG"
  • OOxidation – Loss of electrons, which means a substance loses electrons during a chemical reaction.
  • IIs – Indicates the connection between the two processes.
  • LLoss – Emphasizes the loss of electrons in oxidation.
  • RReduction – Gain of electrons, where a substance gains electrons during a chemical reaction.
  • IIs – Indicates the relationship between oxidation and reduction.
  • GGain – Highlights the gain of electrons in reduction.

3. Types of Chemical Reactions

Mnemonic: "ROCD3"

  • RReduction – A chemical reaction where a substance gains electrons.
  • OOxidation – A chemical reaction where a substance loses electrons.
  • CCombination – A type of reaction where two or more substances combine to form a single product.
  • DDecomposition – A reaction where a single compound breaks down into two or more products.
  • D: Displacement – A reaction where one element replaces another in a compound.
  • D: Double Displacement A reaction where parts of two compounds switch places to form two new compounds.

4. Preventive Ways of Rusting

Mnemonic: "POGG"

  • PPainting – Applying a protective layer of paint to prevent moisture and oxygen from reaching the metal.
  • OOiling – Applying oil to metal surfaces to protect them from moisture.
  • GGreasing – Using grease as a protective coating to prevent rust.
  • GGalvanizing – Coating metal with a layer of zinc to prevent rusting by providing a barrier against corrosion.
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