Answer:

1. a mixture is a material made up of two or more different chemical substance/substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.
2. -Homogeneous mixture has the same composition throughout .

-Heterogeneous mixture varies in its composition.

-Mixture is a combination of two or more substances in any proportions. The substances in a mixture do not combines chemically so they retain there physical properties

3.Appearance

-A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases. The three phases or states of matter are gas, liquid, and solid.

Melting Point

-The melting point of a pure substance is always higher and has a smaller range than the melting point of an impure substance or, more generally, of mixtures. The higher the quantity of other components, the lower the melting point and the broader will be the melting point range, often referred to as the "pasty range".

Boiling Point

-And as always, the boiling point is the temperature AND pressure at which the vapour pressure of the liquid is equal to the ambient pressure, and bubbles of vapour form directly in the liquid. If a mixture contains SOLUTES, the boiling point of the solution is ELEVATED with respect to that of the pure solvent.

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