Question

question 4 which process is a physical change? rusting iron melting ice cooking an egg burning coal question 5 tearing paper is an example of a chemical reaction chemical change ionic bond physical change

Explanation:

Physical changes do not alter the chemical composition of a substance. Melting ice only changes water from a solid to a liquid state without changing its chemical makeup (H₂O). Tearing paper changes its physical form but not its chemical identity. Rusting iron is a chemical reaction forming iron oxide, cooking an egg denatures proteins (a chemical change), and burning coal is a combustion reaction (a chemical change).

Answer:

Question 4: melting ice
Question 5: physical change