Identify the pure substances and mixture from the following:
(a) Oxygen (b) Honey (c) Soil (d) Air
(e) Common salt (f) Petrol (g) Distilled water (h) Gold
Identify the pure substances and mixture from the following:
(a) Oxygen (b) Honey (c) Soil (d) Air
(e) Common salt (f) Petrol (g) Distilled water (h) Gold
Pure substance:
- Pure substances are substances that contain the same kind of atoms or molecules and have a definite set of physical and chemical properties.
- Pure substances are of two types: elements and compounds.
Elements:
- Element is a pure substance that is made up of the same kind of atoms.
- For example gold, iron. silver, etc.
Compound:
- Compound is a pure substance that is made up of a combination of two or more elements combined in a fixed ratio.
- For example water, carbon dioxide, etc.
Oxygen, Common salt, distilled water, and gold are pure substances.
Oxygen: It is an element, made up of the same kind of atoms.
Common salt: It is a compound that is made up of sodium and chlorine combined in a fixed ratio.
Distilled water: Distilled water is pure water and a compound made up of oxygen and hydrogen which are combined in a fixed ratio.
Gold: Gold is an element, that is made up of the same kind of atom.
Mixture:
- Mixtures are impure substances that are made up of a combination of different substances.
Honey, air, petrol, and soil are a mixture.
Honey is a mixture. It contains sugar, nectar, etc.
Air is a homogeneous mixture of different gases.
Petrol is a mixture of different compounds.
Soil is a mixture of different organic and inorganic compounds.
Pure substance:
- Pure substances are substances that contain the same kind of atoms or molecules and have a definite set of physical and chemical properties.
- Pure substances are of two types: elements and compounds.
Elements:
- Element is a pure substance that is made up of the same kind of atoms.
- For example gold, iron. silver, etc.
Compound:
- Compound is a pure substance that is made up of a combination of two or more elements combined in a fixed ratio.
- For example water, carbon dioxide, etc.
Oxygen, Common salt, distilled water, and gold are pure substances.
Oxygen: It is an element, made up of the same kind of atoms.
Common salt: It is a compound that is made up of sodium and chlorine combined in a fixed ratio.
Distilled water: Distilled water is pure water and a compound made up of oxygen and hydrogen which are combined in a fixed ratio.
Gold: Gold is an element, that is made up of the same kind of atom.
Mixture:
- Mixtures are impure substances that are made up of a combination of different substances.
Honey, air, petrol, and soil are a mixture.
Honey is a mixture. It contains sugar, nectar, etc.
Air is a homogeneous mixture of different gases.
Petrol is a mixture of different compounds.
Soil is a mixture of different organic and inorganic compounds.
