Question

Rusting of iron is termed as a permanent change because it:

• A. is irreversible
• B. is reversible
• C. occurs slowly
• D. involves the formation of a new substance

Answer 1

The correct option is A is irreversible

During rusting, iron undergoes a series of changes and results in the formation of iron oxide (rust). This change cannot be reversed and is hence termed as a permanent change.