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Formation of the mixture is a ________ change whereas formation of a compound is a ________ change, respectively.
physical, physical
physical, chemical
chemical, chemical
chemical, physical
physical, chemical
The formation of a mixture is a physical change because the constituents retain their chemical identities and can be separated by physical means. Conversely, the formation of a compound is a chemical change because it involves a chemical reaction where substances combine to form a new substance with entirely different chemical properties.
The formation of a mixture is a physical change because the constituents retain their chemical identities and can be separated by physical means. Conversely, the formation of a compound is a chemical change because it involves a chemical reaction where substances combine to form a new substance with entirely different chemical properties.
Mixing sand and salt together is a physical change because you can easily separate them using water and filtration. However, burning wood to create ash and smoke is a chemical change because you cannot turn the ash and smoke back into wood.
MIX = P (Physical - no change to particles); COMPOUND = C (Chemical - changes composition).
In a physical change, no new chemical bonds are formed, and the original substances do not lose their fundamental characteristics. In a chemical change (formation of a compound), atoms rearrange to form new chemical bonds, resulting in a product that possesses distinct physical and chemical properties compared to the reactants.
Mixture: Components maintain their individual properties.
Compound: Resultant substance has unique properties different from constituents.
Separation: Mixtures can be separated by physical methods like filtration, evaporation, or distillation.
Composition: Compounds have a fixed ratio of elements, while mixtures can have variable composition.
Mixtures allow for adjusting the ratio of components (e.g., alloys like Brass).
Compounds provide stable and predictable substances for chemical reactions.
Mixtures: Air, sea water, soil, alloys.
Compounds: Water (H2O), Table Salt (NaCl), Carbon Dioxide (CO2).
| Feature | Mixture Formation | Compound Formation |
|---|---|---|
Nature of Change | Physical | Chemical |
Separation | Physical Methods | Chemical/Electrochemical Methods |
Formation of a mixture involves only physical mixing, whereas compounds require chemical bonding (ionic or covalent).
Option B represents the correct sequence: 'physical' for mixtures and 'chemical' for compounds.
B is correct тАФ Formation of a mixture is a physical change whereas formation of a compound is a chemical change.
Always remember that if a substance can be separated back into its components by physical processes like heating or filtering, it's almost certainly a mixture!
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