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: -Dissolving common salt in water-Physical change.
Detailed explanation-2: -Dissolving salt in water is a chemical change.
Detailed explanation-3: -Answer and Explanation: The dissolving of a solid in water is a physical change, because no chemical reaction occurs, and there is no new substance produced as a result.
Detailed explanation-4: -Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together. After the salt compounds are pulled apart, the sodium and chloride atoms are surrounded by water molecules, as this diagram shows. Once this happens, the salt is dissolved, resulting in a homogeneous solution.
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.