Question

Pure substances and Mixtures.
Defination of these with example and it's properties.
​

Answer 1

A pure substance consist only of one element or on compound.a mixtures consist of two r more different substances ,not chemically joined together.

Answer 2

⇒ Given :-

• Pure substances

• Mixtures.

⇒ To Find :-

• Definition of these with example and it's properties.

⇒ Answer :

✦ Pure substances :

• The substances which are made of only one kind of atoms or molecules are known as pure substances. For example Elements and compounds.

→ Properties of pure substances :

• Pure substances have fixed melting and boiling points.

• Addition of  impurities will change the melting and boiling points of pure substances.  

✦ Mixture :

• Materials that contain different substances physically mixed in any ratio are called mixtures.  For example : Air

→ Properties of mixture :

• Mixture is not pure substances.

• Mixture do not have fixed melting and boiling points.

$\huge{\boxed{\sf{\ Hence~stated}}}}$