Question

Account for the following: (1) Mixing of iron filings and sulphur is a physical change. (2) Air is a homogeneous mixture.
(3) Salt solution does not show Tyndall effect.​

Answer 1

Explanation:

1)it is a physical change because no new substance is formed

2) air can be called a homogenous mixture because its composition is uniform

3)salt solution doesnt disperse a beam of light passing through it so it doesnt show tyndall effect