Question

Define the following-
A) Pure substance
B) Impure substance
C) Alloy
D) Solution
E) Heterogeneous mixture
F) Homogenous mixture

Answer 1

Hint: We need to know that the ability of one compound to dissolve in another compound is called solubility. When a liquid can completely dissolve in another liquid the two liquids are miscible. Two substances that can never mix to form a solution are said to be immiscible. The physical properties of compounds such as melting point and boiling point change when other compounds are added.

Complete answer:
We will define each of the following one by one. Let’s start with pure substance first. A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds. Next is Impure substance, Mixtures of elements or compounds in a substance is called impure substance. Example of impure substance is as follows: Salt mixed in water. Next is Alloys, An alloy is an admixture of metals, or a metal combined with one or more other elements. For example, combining the metallic elements gold and copper produces red gold. Now what is a solution? A solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent. The mixtures are of two types Heterogeneous and Homogeneous mixture.
Heterogeneous mixture: A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture. It consists of two or more phases.
Homogeneous mixture: A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. All solutions would be considered homogeneous because the dissolved material is present in the same amount throughout the solution.

Note:
We have to know that homogeneous means that the components of the mixture form a single phase. Heterogeneous means that the components of the mixture are of different phases. The properties of the mixture can be uniformly distributed through the volume but only in absence of diffusion phenomena or after their completion.