SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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physical change
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chemical change
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neither
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None of the above
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Detailed explanation-1: -The boiling of water to form steam is a physical change because the vapors formed can be converted into the water on cooling. Was this answer helpful?
Detailed explanation-2: -Research shows that students frequently use the term chemical change to describe changes in physical state. Freezing and boiling are considered to be examples of chemical reactions.
Detailed explanation-3: -Step 1: Identify what type of change is being asked. Step 2: If it is temporary and no new product is formed, then it is a physical change. On the other hand, if it is permanent and one or more new products are formed, then it is a chemical change.
Detailed explanation-4: -Examples of chemical changes would be burning, cooking, rusting, and rotting. Examples of physical changes could be boiling, melting, freezing, and shredding. Most physical changes can be reversed if sufficient energy is provided.
Detailed explanation-5: -Melting an ice cube. Boiling water. Mixing sand and water. Breaking a glass. Dissolving sugar and water. Sublimation of dry ice. Crumpling a paper bag.