SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Only the salt dissolves in the water.
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Nothing in the bowl dissolves in the water.
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Only the salt and rocks dissolve in the water.
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Everything in the bowl dissolves in the water.
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Detailed explanation-1: -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-2: -Therefore, dissolving salt in water is an example of a chemical change.
Detailed explanation-3: -Sand will remain undissolved at the bottom. Both salt and sand will dissolve completely in water.
Detailed explanation-4: -Answer and Explanation: When a salt solution is heated, the solvent (assumedly water) will evaporate at a greater rate because the water molecules have greater energy. Eventually the solution will pass its boiling point, and the water will begin to boil off (evaporate) to form a gas.