Question

Which of the following is a physical change (and NOT a chemical change)?

a.two solutions mixed together turn from colorless to pink
b.a solid precipitate forms a
c.drop of methanol in a beaker evaporates
d.a bright red flame is observed

Answer 1

The physical change is the evaporation of methanol in a beaker.

Step-by-step explanation:

The physical change in this case is option c, where a drop of methanol in a beaker evaporates. A physical change is a change in the physical properties of a substance, such as its physical state or appearance, without any new substances being formed. In this case, the methanol is changing from a liquid to a gas, but no new substances are being produced.