Learn Class 9 Science - Is Matter Around Us Pure

Pure substances are the presence of compounds of the elements. These are the types of substances that are made with one entity. Pure substances are the parts that can not get broken by physical methods, like CO2 or Diamond.

Compounds

The term compounds are the presence of pure substances that are made with more than two elements with a definite ratio.

Features

1. The compound properties are very different from constituents.
2. The substance compounds have a fixed melting point.
3. The compound is from a homogeneous substance.
4. The compound comprises more than two elements in a mixed ratio.

Types

The mixture is of two different types. These types are discussed here.

1. Homogeneous

   A homogeneous mixture is one type of mixture that is uniform.

   e.g.: Salt in water, sugar in water.

2. Heterogeneous

   The mixture consists of different parts.

   e.g.: Iron filings, sand, and sugar.

Alloys

The component alloys are combinations of metals,i.e., homogeneous. Or it is a combination of metal or one more component that can not be isolated into their parts by actual strategies.

Models

• Steel, a mix of iron , i.e., metal & carbon ,i.e., non-metal.
• Metal is a combination of copper & zinc metal.