SSC
CHEMISTRY
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Wood Burning
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A cake baking in an oven
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Melting Ice Cream
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Mixing Vinegar and Baking Soda
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Detailed explanation-1: -The correct answer is Freezing of water. Freezing is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point. Freezing of water is not a chemical change as ice when melt changes back to water showing the physical change.
Detailed explanation-2: -The ice pulls the heat away from the ice cream to melt which allows the ice cream to freeze. This is an example of an exothermic reaction . An exothermic reaction is a chemical reaction that releases light or heat, otherwise known as energy .
Detailed explanation-3: -Yes, the melting of ice cream is a physical change because here only change in physical state is taking place that is from solid to liquid and if we want again a solid ice cream we can freeze it.