Allied solutions

Allied solutions

Grade 7

Elements, Compounds and Mixtures | Exercise

Question 13

Q13) Explain the term mixture. Differentiate between a homogeneous and a heterogeneous mixture with one example of each in the (a) solid-solid (b) solid-liquid (c) liquid-liquid state of the mixture.

Solution:

Substances made up of two or more elements or compounds or both, mixed together in any proportion are called mixtures.

Examples - Iron and sand mixture, milk and sugar

Homogeneous Mixture Heterogeneous mixture
The constituents are uniformly mixed in a homogeneous mixture. The constituents are not mixed uniformly in a heterogeneous mixture.
The properties and composition are uniform throughout the mixture. The properties and composition vary throughout the mixture.
Example - (i) Solid-solid - Alloys (ii) Solid-liquid - Sugar solution, (iii) Liquid-liquid - Alcohol & Water Examples - (i) Solid-solid - Iron & Sulphur (ii) Solid-liquid - Sand & Water (iii) Liquid-liquid - Oil & Water

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Question 13

Q13) Explain the term mixture. Differentiate between a homogeneous and a heterogeneous mixture with one example of each in the (a) solid-solid (b) solid-liquid (c) liquid-liquid state of the mixture.

Solution:

Substances made up of two or more elements or compounds or both, mixed together in any proportion are called mixtures.

Examples - Iron and sand mixture, milk and sugar

Homogeneous Mixture Heterogeneous mixture
The constituents are uniformly mixed in a homogeneous mixture. The constituents are not mixed uniformly in a heterogeneous mixture.
The properties and composition are uniform throughout the mixture. The properties and composition vary throughout the mixture.
Example - (i) Solid-solid - Alloys (ii) Solid-liquid - Sugar solution, (iii) Liquid-liquid - Alcohol & Water Examples - (i) Solid-solid - Iron & Sulphur (ii) Solid-liquid - Sand & Water (iii) Liquid-liquid - Oil & Water

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