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A pure substance is made of
- a)only one kind of atoms or molecules.
- b)two or more kinds of molecules.
- c)mixture of homogeneous substances
- d)all of the above
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A pure substance is made ofa)only one kind of atoms or molecules.b)two...
A substance is pure if its composition is constant throughout and is made up of only one type of particles i.e. atoms or molecules
This question is part of UPSC exam. View all Class 6 courses
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A pure substance is made ofa)only one kind of atoms or molecules.b)two...
Understanding Pure Substances
A pure substance is a fundamental concept in chemistry, and it refers to materials that are homogeneous and consist of only one type of particle. Here’s a detailed explanation of what that means:
Definition of Pure Substance
- A pure substance is made up of only one kind of atoms or molecules.
- This means it cannot be separated into different components by physical means, such as filtration or evaporation.
Characteristics of Pure Substances
- Uniform Composition: Pure substances have a consistent and uniform composition throughout. This means that every sample of the substance will have the same properties and characteristics.
- Distinct Properties: They exhibit specific physical and chemical properties, such as boiling points, melting points, and density, which do not vary.
Examples of Pure Substances
- Elements: These are pure substances that consist of only one type of atom. For example, oxygen (O2) or gold (Au).
- Compounds: These are pure substances formed when two or more elements chemically combine in fixed ratios. For example, water (H2O) and carbon dioxide (CO2).
Conclusion
In summary, the correct answer is option 'A' because a pure substance is characterized by having only one type of atom or molecule, distinguishing it from mixtures and compounds that may contain multiple types of particles. Understanding this concept is essential for grasping basic chemistry principles.
A pure substance is a fundamental concept in chemistry, and it refers to materials that are homogeneous and consist of only one type of particle. Here’s a detailed explanation of what that means:
Definition of Pure Substance
- A pure substance is made up of only one kind of atoms or molecules.
- This means it cannot be separated into different components by physical means, such as filtration or evaporation.
Characteristics of Pure Substances
- Uniform Composition: Pure substances have a consistent and uniform composition throughout. This means that every sample of the substance will have the same properties and characteristics.
- Distinct Properties: They exhibit specific physical and chemical properties, such as boiling points, melting points, and density, which do not vary.
Examples of Pure Substances
- Elements: These are pure substances that consist of only one type of atom. For example, oxygen (O2) or gold (Au).
- Compounds: These are pure substances formed when two or more elements chemically combine in fixed ratios. For example, water (H2O) and carbon dioxide (CO2).
Conclusion
In summary, the correct answer is option 'A' because a pure substance is characterized by having only one type of atom or molecule, distinguishing it from mixtures and compounds that may contain multiple types of particles. Understanding this concept is essential for grasping basic chemistry principles.
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A pure substance is made ofa)only one kind of atoms or molecules.b)two or more kinds of molecules.c)mixture of homogeneous substancesd)all of the aboveCorrect answer is option 'A'. Can you explain this answer?
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