Question

What is 1) homogeneous mixture?
2) heterogeneous mixture?

Answer 1

A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample. Conversely, a heterogeneous mixture has components whose proportions vary throughout the sample. ... An example of a homogeneous mixture is air

While

A heterogeneous mixture is simply any mixture that is not uniform in composition – it's a non-uniform mixture of smaller constituent parts. Using various means, the parts in the mixture can be separated from one another.

Answer 2

That mixture in which each substance are uniformly defined called homogenous mixture..

For e. g Salt in water, sugar in milk
.

That mixture in which each substance is not uniformly defined called hetrogenous mixture.

For e. g salt in sand.. Sugar in sand etc..