During which changes of state do atoms that cannot move past one another become free to move? vaporization and sublimation boiling and deposition sublimation and melting condensation and melting

Sublimation and melting

Option (c) is the correct answer.

Explanation:

When atoms are not able to move past one another then it means the substance is present in solid state. Whereas if the atoms are able to move past one another then it means the substance is either in liquid or gaseous state.

Also it is known that when a substance vaporizes then it means its atoms are colliding rapidly with each other and hence, they are able to move past one another.

Whereas when a solid substance melts then also atoms tend to collide with each other. Hence, they are able to slide past each other.

Thus, we can conclude that during sublimation and melting changes of state do atoms that cannot move past one another become free to move.

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