Which of the Following Observations Is/are Examples of Chemical Change $^{\circ}$

question 3

Multiple Choice

Which of the following observations is/are examples of chemical change?
1) Iron (Fe) rusts,forming Fe₂O₃.
2) The density of water increases when it changes from a solid to a liquid.
3) Sodium chloride melts at 801 $^{\circ}$ C.

• A) 1 only
• B) 2 only
• C) 3 only
• D) 1 and 2
• E) 2 and 3

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