Question

Define pure substance and impure substance

Answer 1

Answer:

Explanation:

Pure and impure chemical substances

A pure element or compound contains only one substance, with no other substances mixed in. Impure materials may be mixtures of elements, mixtures of compounds, or mixtures of elements and compounds.

Answer 2

${\bold{\blue{\underline{\red{A}\pink{ns}\green{we}\purple{r:-}}}}}$

$\green{\bigstar}\:\:{\underline{\boxed{\bf\red{Pure\:substance}}}}$

✎ A sample of matter which containing only one type of substance is known as pure substance.

• In other words it is one which is made up of only one kind of atom or molecules.

✎ A pure substance cannot be separated into other kinds of matter by any physical process.

✎ It have a fixed composition which doesn't change with time.

✎ Example - Iron,gold,silver,oxygen etc.

$\small\orange{\bigstar}\:\:{\underline{\boxed{\bf\pink{Impure\:substances(Mixtures)}}}}$

✎ Impure substances or mixtures are those type of substances which contains two or more different kind of particles.

✎ It is present in any proportion not in fixed propotion.

✎ Example - salt solution, sugar solution etc.