Question

Which statement correctly describes a physical change?

involves breaking and creating chemical bonds but not changing a phase

may involve a change in phase but does not involve a change in the molecular structure

may involve converting two or more substances into new substances

involves changes at the molecular level

involves energy transfer and change in color

Answer 1

May involve a change in phase but does not involve a change in the molecular structure

Step-by-step explanation:

A physical change is change in phase.

For example a change from liquid to solid or solid to gas etc.

If there is a change at molecular structure it means the process if chemical.

For example breaking of hydrogen molecule to monoatomic hydrogen.

If there is a change involving conversion of one substance to other or generation of new substances then it must be a chemical change.

For example combination of hydrogen with oxygen to form water molecule.

Answer 2

may involve a change in phase but does not involve a change in the molecular structure

involves energy transfer and change in color