Which of the following changes is NOT a chemical change?A. Boiling of waterB. Boiling of eggC. Burning of paperD. Burning of cloth
A. Boiling of water
Boiling of water is a physical change, not a chemical change. In this process, water goes from a liquid state to a gaseous state without undergoing a chemical reaction. The molecules in water remain H2O throughout the process, and no new substances are formed. The other options (B, C, and D) involve chemical changes because they all involve the combustion of organic materials (egg, paper, and cloth), leading to the formation of new substances and chemical reactions.
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With the help of labelled diagrams explain the human male reproductive system.
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A. II and V only
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