Question

Item 4

Which statement best describes a mixture?

two or more substances that are mixed but can be separated back to their original form, maintaining their original properties

one substance that can be separated but maintains its individual properties

at least three substances that are mixed and do not maintain their individual properties

the result of a chemical reaction between two substances, such as sodium and chlorine resulting in salt

Answer 1

The statement that best describes a mixture is -

• two or more substances that are mixed but can be separated back to their original form, maintaining their original properties.

Step-by-step explanation:

A mixture is that form of matter in which two or more substances are simply mixed in any proportion and it can be separated back to their original form.

• There are two types of Mixtures -

1. Homogeneous Mixtures
2. Heterogeneous Mixtures

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In Homogeneous Mixtures, the composition is uniform throughout such as sugar in water , salt in water , sulphur in carbon disulphide , water and alcohol , whereas Heterogeneous Mixtures has non Uniform composition such as sand and salt , sugar and salt , wood , blood , water in soil etc.

• Pure substance is a Homogeneous material which consists of a single type of particles atoms or molecules with definite set of properties.