Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which of the following statements correctly differentiates a compound from a mixture?
Compounds show variable composition, mixtures do not.
Mixtures are formed through chemical reactions.
Mixtures can be separated by physical means, but compounds cannot.
Compounds retain the properties of their constituents.
Mixtures can be separated by physical means, but compounds cannot.
Compounds are substances formed by the chemical combination of two or more elements in a fixed ratio, resulting in a new substance with entirely different properties. In contrast, mixtures are physical combinations of substances where each constituent retains its individual chemical identity and can be separated using physical methods.
Compounds are substances formed by the chemical combination of two or more elements in a fixed ratio, resulting in a new substance with entirely different properties. In contrast, mixtures are physical combinations of substances where each constituent retains its individual chemical identity and can be separated using physical methods.
Think of a cake (compound) versus a bowl of fruit salad (mixture). You cannot 'un-bake' a cake back into raw eggs and flour using a filter, but you can easily pick the grapes out of a fruit salad with your hands.
CM-PC: Compounds involve Chemical bonds, Mixtures use Physical separation.
H2тАЛO тАФ Chemical formula of a compound showing fixed ratio (2:1)
Na┬аCl тАФ Chemical formula of sodium chloride, where properties differ from Na (metal) and Cl (gas)
In a compound, atoms are held together by chemical bonds (ionic or covalent), creating a new entity represented by a fixed chemical formula like H2тАЛO. Separating these bonds requires significant energy through chemical processes like electrolysis. Conversely, the components of a mixture are held by weak physical forces, allowing for separation via techniques like filtration, distillation, or magnetism.
Compounds have a fixed composition by mass.
Mixtures have a variable composition.
Compounds require chemical reactions to form or break.
Mixtures do not involve energy changes in their formation.
Compounds allow for the creation of stable, predictable materials.
Mixtures allow for the recovery of pure substances from combinations.
Compounds cannot be separated by simple physical means.
Mixtures lack the stability and uniform properties of pure compounds.
Purification of water via distillation (separating a mixture).
Synthesis of medicines (forming specific compounds).
| Feature | Compound | Mixture |
|---|---|---|
Constituent Properties | New properties emerge | Properties retained |
Separation Method | Chemical processes only | Physical processes |
Option A is incorrect because compounds follow the law of constant proportions.
Option B is incorrect because mixtures are physical, not chemical, combinations.
Option D is incorrect because compounds possess unique properties distinct from their elemental components.
C is correct тАФ Mixtures can be separated by physical means, whereas compounds require chemical methods for separation.
In competitive exams, always remember: if you see 'physical methods' like boiling, filtering, or chromatography, the answer usually relates to a 'mixture'.