chemistry. list five characterstics by which compounds can be distinguished from mixtures
Answers
A mixture
A compound
Use iron filings and sulphur powder and distinguish between these on the basis of:
Appearance, i.e., homogeneity and heterogeneity.
Behaviour towards a magnet.
Behaviour towards carbon disulphide as a solvent.
Effect of heat.
Effect of heating with dil. HCl.
The Theory
Let’s study how matter is classified!
All matter can be classified into two categories: pure substances and mixtures.
A pure substance consists of elements or compounds. Furthermore,mixtures can be classified into homogeneous (uniform appearance and composition throughout) and heterogeneous(made of different substances).
What are elements and compounds?
Elements:
Elements are the simplest substances in nature. There are around 90 naturally occurring elements on earth. They cannot be broken down into anything simpler by physical or chemical means. They consist of only one kind of atom and they can exist as either atoms (e.g., argon, calcium, aluminium) or molecules (oxygen, nitrogen).