Question

4. Air is a
a) homogeneous mixture
b) compound
heterogeneous mixture
d) pure substance​

Answer 1

Answer:

A) Homogeneous Mixture

Explanation:

A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample.  

If we consider some region of air, the gases, their volumes present in one part of the region equal to another one part of same region. We aren't able to divide different gases present in air.  

The statement is True.

A mixture in which its constituents are not distributed uniformly is called heterogeneous mixture, such as sand in water. One example of a mixture is air. Air is a homogeneous mixture of the gaseous substances nitrogen, oxygen, and smaller amounts of other substances.

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Answer 2

Air is a homogeneous mixture.

your (a) option is correct.