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

1. Types of Chemical Reaction

Mnemonic: "Cats Don't Dance During Evening Outings"

Interpretations:

• C: Combination Reaction (Two or more reactants form a single product)
• D: Decomposition Reaction (A single reactant breaks down into two or more products)
• D: Displacement Reaction (A more reactive element replaces a less reactive one)
• D: Double Displacement Reaction (Exchange of ions between two compounds)
• E: Endothermic & Exothermic Reactions (Energy absorption or release in reactions)
• O: Oxidation & Reduction (Redox) Reactions (Loss/gain of electrons or oxygen/hydrogen)

2. Types of Decomposition Reaction

Mnemonic: "PET"

• P: Photolytic Reaction – Decomposition caused by light, where substances break down when exposed to light.
• E: Electrolytic Reaction – Decomposition caused by electric current, where substances break down in an electrolyte solution.
• T: Thermal Reaction – Decomposition caused by heat, where substances break down when heated.

2. Oxidation and Reduction Reactions

Mnemonic: "OIL RIG"

• O: Oxidation – Loss of electrons, which means a substance loses electrons during a chemical reaction.
• I: Is – Indicates the connection between the two processes.
• L: Loss – Emphasizes the loss of electrons in oxidation.
• R: Reduction – Gain of electrons, where a substance gains electrons during a chemical reaction.
• I: Is – Indicates the relationship between oxidation and reduction.
• G: Gain – Highlights the gain of electrons in reduction.

4. Preventive Ways of Rusting

Mnemonic: "POGG"

• P: Painting – Applying a protective layer of paint to prevent moisture and oxygen from reaching the metal.
• O: Oiling – Applying oil to metal surfaces to protect them from moisture.
• G: Greasing – Using grease as a protective coating to prevent rust.
• G: Galvanizing – Coating metal with a layer of zinc to prevent rusting by providing a barrier against corrosion.