NCERT Solution for Class 9 Science Chapter 2
Is Matter Around Us Pure
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-15
Questions No-2
List the points of differences between homogeneous and heterogeneous mixtures.
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A homogeneous mixture is a mixture having a uniform composition throughout the mixture. For example: salt in water, sugar in water, copper sulphate in water
A heterogeneous mixture is a mixture having a non-uniform composition throughout the mixture. For example: sodium chloride and iron fillings, salt and sulphur, oil and water
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Homogeneous mixtures
Homogeneous mixtures have uniform composition.
It has no visible boundaries of separation between its constituents.
Heterogeneous mixtures
Heterogeneous mixtures have non uniform composition.
It has visible boundaries of separation between its constituents.
The key points outlining the differences between homogeneous and heterogeneous mixtures:
Homogeneous Mixtures:
– Uniform Composition: Substances are uniformly dispersed at a molecular level, resulting in a consistent appearance without visible boundaries.
– Examples: Saltwater, air, and alloys like brass exhibit uniformity and consistency throughout, making it impossible to distinguish individual components with the naked eye.
Heterogeneous Mixtures:
– Non-uniform Composition: Components are visibly separate, leading to visible variations or distinct phases within the mixture.
– Examples: Mixtures such as salads, trail mix, and soil display visible differences between components, allowing for easy differentiation due to their uneven distribution.
These differences in uniformity and visibility define how substances are distributed within the mixtures, impacting their overall appearance and distinguishability of components.